Correct option is C Explanation: Compounds containing methyl keto group or compounds (R−OH∣CH−CH3) that can be oxidised to methyl keto group can undergo haloform...
Test
What is the unit of density? (A) (B) (C) (D)
Correct option is C
The most basic hydroxide from following is (A) (B) (C) (D)
Correct option is D Explanation: The basic nature of hydroxides changes from La3+ to Lu3+ as a result of lanthanoid contraction. As a result, the covalent character of the Ln—OH connection becomes...
Which of the followings is most reactive towards addition reaction of hydrogen cynide to form corresponding cynohydrin? (A) Acetone (B) Formaldehyde (C) Acetaldehyde (D) Diethylketone
Correct option is B Explanation: Formaldehyde (HCHO) is most reactive towards addition reaction of hydrogen cyanide because it is least sterically hindered
In which substance does nitrogen exhibit the lowest oxidation state? (A) Nitrogen gas (B) Ammonia (C) Nitrous oxide (D) Nitric oxide
Correct option is B Explanation: Nitrogen exhibits lowest oxidation state in ammonia. so, option (B) is correct.
What is the number of donor atoms in dimethylglyoximato ligand? (A) 1 (B) 2 (C) 3 (D) 4
Correct option is (B) Explanation: The dimethylglyoximato ligand is a bidentate ligand. Bidentate ligands are those that have two atoms that directly coordinate with the metal atom or that donate...
Which of the followings is a tricarboxylic acid? (A) Citric acid (B) Malonic acid (C) Succinic acid (D) Malic acid
Correct option is A Explanation: Malonic acid, succinic acid and malic acid are dicarboxylic acids while citric acid is a tricarboxylic acid.
Molarity is (A) The number of moles of solute present in volueme of solution (B) The number of moles of solute dissolved in of solvent (C) The number of moles of solute dissolved in of solution (D) The number of moles of solute dissolved in volume of solution
Correct option is A. (the number of moles of solute present in $1 \mathrm{dm}^{3}$ volume of solution) Explanation: Since the molarity is moles per litre and $1 \mathrm{dm}^{3}$ is equal to $1...
Which of the following carboxylic acids is most reactive towards esterification? (A) (B) (C) (D)
Correct option is C Explanation: Because the C atom of the carboxylic group is the least sterically hindered, $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}$ is the most reactive towards...
Which carbon atom of deoxy Ribose sugar in does NOT contain C-OH bond (A) (B) (C) (D)
Correct option is C Deoxyribose is a five-carbon-atom pentose sugar. The ring's four carbon atoms are numbered 1', 2', 3', and 4'. - CH2OH has a carbon atom with the number 5'. At positions 1', 3',...
The molarity of urea (molar mass ) solution by dissolving of urea in of water is (A) 2 mol (B) mol (C) (D)
Correct option is B ($0.5 \mathrm{~mol} \mathrm{dm}^{-3}$) Explanation: The number of moles of urea $=\frac{\text { Mass of urea }}{\text { Molar mass of urea }}=\frac{15 \mathrm{~g}}{60 \mathrm{~g}...
The number of moles of electrons passed when current of is passed through an solution of electrolyte for 20 minutes is (A) mol (B) mol (C) mol (D) mol
Correct option is C ($2.487 \times 10^{-2}$) mole Explanation: Current passed, $\mathrm{I}=2 \mathrm{~A}$ Time for which current is passed $\mathrm{t}=20 \mathrm{~min}=20 \mathrm{~min} \times 60...
What is the catalyst used for oxidation of to in lead chamber process for manufacture of sulphuric acid? (A) Nitric oxide (B) Nitrous oxide (C) Potassium iodide (D) Dilute
Correct option is A (Nitric oxide) Explanation: Nitric oxide (NO) is the catalyst used for oxidation of $\mathrm{SO}_{2}$ to $\mathrm{SO}_{3}$ in lead chamber process for manufacture of sulphuric...
Which of the following compounds reacts immediately with Lucas reagent? (A) (B) (C) (D)
Correct option is D Explanation: A solution of anhydrous zinc chloride in strong hydrochloric acid is known as Lucas reagent. This solution is used to classify low-molecular-weight alcohols. The...
Which symbol replaces the unit of atomic mass, amu?
A)u
B)A
C)M
D)n
Correct option is A (u) Explanation: The atomic mass unit, amu, is represented by the symbol 'u.' The atomic mass of carbon-12, for example, is expressed as 12 u. As a result, option A is...
What is the oxidation number of gold in the complex (A) (B) (C) (D)
Correct option is B $+3$ Oxidation state of chlorine $\mathrm{Cl}$ is $-1$. Let the oxidation number of gold Au be $x$. $ \begin{array}{l} \therefore \mathrm{x}+4 \times(-1)=-1 \\ \Longrightarrow...
Which among the following oxoacids of phosphorus shows a tendency of disproportionation? (A) Phosphinic acid (B) Orthophosphoric acid (C) Phosphinic acid (D) Pyrophosphoric acid
Correct option is C Phosphonic acid $\left(\mathrm{H}_{3} \mathrm{P} \mathrm{O}_{3}\right)$ Explanation: Phosphonic acid $\left(\mathrm{H}_{3} \mathrm{P} \mathrm{O}_{3}\right)$ shows a tendency of...
Which among the following metal crystallise as a simple cube? (A) Polonium (B) Iron (C) Copper (D) Gold
Correct option is A (Polonium) Explanation: Polonium forms a simple cube when crystallised. The BCC unit cell is formed when iron crystallises. The FCC unit cell is formed by the crystallisation of...
Identify the functional group that has electron donating inductive effect. (A) (B) (C) (D)
The correct answer is C. The inductive effect of $-CH 3$ is electron donating (+I). The remaining three, on the other hand, indicate an electron withdraing inductive action. As a result, the correct...
Identify the product in the following reaction. Aniline (A) Acetanilide (B) -Bromoacetanilide (C) -Bromoaniline (D) -Bromoaniline
The correct answer is C. (p-Bromoaniline) Explanation: 1) The aniline's amino group is acetylated with acetic anhydride/pyridine. 2) It is then brominated with acetic acid and bromine. Because the...
Identify the element that forms amphoteric oxide. (A) Carbon (B) Zinc (C) Calcium (D) Sulphur
Correct option is B (Zinc) Explanation: Zinc form amphoteric metal oxide $\mathrm{ZnO}$. It reacts with acids as well as bases. $ \mathrm{ZnO}+2 \mathrm{HCl} \rightarrow...
Formation of is explained on the basic of what hybridisation of phosphorus atom? (A) (B) (C) (D)
Correct option is B Explanation: It is possible to establish the type of hybridisation that occurs in an atom. Making use of the formula $ H=\frac{1}{2}[V+Y-C+A] $ Here, $V=$ valence shell electrons...
During galvanization of iron, which metal is used for coating iron surface? (A) Copper (B) Zinc (C) Nickel (D) Tin
Correct option is B (Zinc) Explanation: The process of adding a protective zinc coating to steel or iron to prevent rusting is known as galvanization or galvanising.
Which among the following equations represents the first law of thermodynamics under isobaric conditions? (A) (B) (C) (D) .
Correct option is A Explanation: According to first law of thermodynamics, $\Delta U=q+W$ In case of isobaric conditions, change of state is brought about at constant pressure, i.e. $d p=Q$...
A certain reaction occurs in two steps as (i) (ii) In the reaction, (A) is intermediate (B) is intermediate (C) is catalyst (D) is intermediate
Correct option is B (NO (g) is intermediate) Explanation: Because NO (g) is created in the first stage and consumed in the second, it is considered intermediate. In the first process, a catalyst may...
Name the metal that is purified by placing the impure metal on sloping hearth of a reverberatory furnace and heating that above its melting point in absence of air. A) Mercury B) Galium C) Zirconium D) Copper
Correct option is D (Copper) Explanation: Copper is a purified metal that is purified by heating it over its melting point in the absence of air on a sloping hearth of a reverberatory surface.
Which halogen forms an oxyacid that contains the halogen atom in tripositive oxidation state ? A) Fluorine B) Chlorine C) Bromine D) Iodine
B is the correct answer (Chlorine) The halogen atom in the chlorine halogen creates an oxyacid, $HClO_2$, which has a tripositive oxidation state. The oxidation number of chlorine in $HClO_2$ is +3.
Which among the following solutions is NOT used in determination of the cell constant ? A) M KCl B) M KCl C) 1 M KCl D) Saturated KCl
Correct Answer: D. Saturated $\mathrm{KCl}$ Explanation: Only the conventional solution of $\mathrm{KCl}$ is used to get the cell constant. Options (a), (b), and (c) are standard solutions, however...
A mixture of benzaldehyde and formaldehyde when treated with 50% NaOH yields A) Sodium benzoate and sodium formate B) Sodium formate and benzyl alcohol C) Sodium benzoate and methyl alcohol D) Benzyl alcohol and methyl alcohol
Correct option is B (sodium formate and benzyl alcohol) Explanation: When benzaldehyde and formaldehyde are treated with 50% NaOH, sodium formate and benzyl alcohol are formed. This is referred to...
Which of the following proteins is globular ? A) Collagen B) Albumin C) Myosin D) Fibroin
Correct option is B (Albumin) Explanation: Unlike fibrous or membrane proteins, globular proteins are relatively water soluble (forming colloids in water). Albumin is a protein that is globular in...
Given , the work done during combustion of of ethane (molar mass ) at is A) B) C) D)
Correct option is B $18.7 \mathrm{~kJ}$ $ \begin{array}{l} \mathrm{C}_{2} \mathrm{H}_{6(\mathrm{~g})}+\frac{7}{2} \mathrm{O}_{2(\mathrm{~g})} \longrightarrow...
Which among the following functional groups has been given the highest priority while assigning R-S configuration? A) B) C) D)
Correct option is B Explanation: Because -CN has the highest atomic number, the atom with the highest atomic number that is immediately linked to carbon will be seen first, followed by the remaining...
Which among the following group 15 element forms most stable pentavalent compound? A) Phosphorus B) Antimony C) Bismuth D) Arsenic
Correct option is A Explanation: Because of the availability of d-electrons, phosphorus is a 15th group element that forms the most stable pentavalent compound. The stability of the +5 oxidation...
The process in which metal surface is made inactive is called A) Passivation B) Galvanizing C) Corrosion D) Pickling
Correct option is A Explanation: Passivation is the process of rendering a metal surface inert. Metal is treated with high oxidising chemicals, such as concentrated nitric acid, in this procedure....
What is the volume of water consumed during acid hydrolysis of of sucrose? (Given molar masses of sucrose , water , density of water ) A) B) C) D)
Correct option is A ($0.072 \mathrm{dm}^{3}$) $ \mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}+\mathrm{H}_{2} \mathrm{O} \stackrel{\mathrm{H}^{+}}{\longrightarrow} \mathrm{C}_{6} \mathrm{H}_{12}...
The correct order of reactivity of aldehydes and ketones towards hydrogen cyanide is A) B) C) D)
Correct option is D) $\left.\mathrm{HCHO}\rangle \mathrm{CH}_{3} \mathrm{CHO}\right\rangle \mathrm{CH}_{3} \mathrm{COCH}_{3}$ The following is the right order of reactivity of aldehydes and ketones...
What is the basicity of orthophosphorus acid ? A) One B) Two C) Three D) Four
B is the correct answer The basicity of orthophosphorous acid is two due to the presence of two - OH groups in its structure.
Identify the heteropolymer from the list given below. A) Polythene B) Nylon-6 C) Teflon D) Nylon-6, 6
D is the correct answer (Nylon-6, 6) A heteropolymer is one that is made up of two or more distinct (though often related) monomers. Hexamethylenediamine and adipic acid, which give nylon 66 its...
What is the chemical composition of Nicol’s prism? A) B) C) D)
Correct option is C Explanation: A Nicol prism is a type of polarizer, which is an optical device that produces a polarised light beam. It is constructed in such a way that total internal reflection...
Identify a metalloid from the following list of elements. A) Carbon B) Neon C) Sodium D) Tellurium
Correct option is D Explanation: Tellurium is a silvery-white metalloid that possesses both metal and non-metal characteristics. Sodium is a metal, while carbon and neon are non-metals. As a result,...
Select a ferromagnetic material from the followings. A) Dioxygen B) Chromium (IV) oxide C) Benzene D) Dihydrogen monoxide
Correct option is B Explanation: Chromium (IV) dioxide is a ferromagnetic substance. These compounds' ferromagnetic properties allow them to be employed in data tapes, which are used to store data....
this reaction is known as A) Etard reaction B) Stephen reaction C) Hell-Vohlard-Zelinsky reaction D) Balz-Schiemann reaction
B is the correct answer. Explanation: Using tin chloride and dilution, aldehydes (R-CHO) are synthesised from nitriles (R-CN). Stephen's reaction is the reaction of HCl in an acidic media. As an...
For the reaction if the rate law expression is, rate the molecularity and order of the reaction are respectively A) 2 and 2 B) 2 and C) 2 and 1 D) 1 and 2
Correct option is A (2 and 2) Rate $=\mathrm{K}\left[\mathrm{O}_{3}\right][\mathrm{O}]$ Order $=1+1=2$ Hence, the overall order of the reaction is 2 . Now, $ \mathrm{O}_{3(9)}+\mathrm{O}_{(9)}...
are the examples of what type of isomerism ? A) Ionisation isomerism B) Linkage isomerism C) Coordination isomerism D) Solvate isomerism
Correct option is C (Coordination isomerism) Explanation: The above examples are of coordination isomerism. It is because there are two coordination spheres in a compound.
For which among the following reactions, change in entropy is less than zero ? A) Sublimation of Iodine B) Dissociation of Hydrogen C) Formation of water D) Thermal decomposition of Calcium Carbonate
Correct option is B Explanation: The change in entropy during hydrogen dissociation is less than zero, which indicates it is negative. Hydrogen dissociation is a non-spontaneous process. As a...
The only radioactive element among the lanthanoids is A) Gadolinium B) Holmium C) Promethium D) Neodynium
Correct option is C Explanation: Promethium (Pm) is a lanthanoid element with the atomic number 61 and the symbol Pm. Its isotopes are all radioactive. Lanthanoids such as gadolinium, holmium, and...
The overall reaction taking place at anode during electrolysis of fused sodium chloride using suitable electrode is A) Oxidation of chloride B) Reduction of sodium ions C) Reduction of chlorine D) Oxidation of Sodium atoms
Correct option is A During the electrolysis of fused sodium chloride with a suitable electrode, the chloride ion is oxidised at the anode. Chloride ions are oxidised to chlorine gas by giving up...
What is the most abundant element on earth ? A) Hydrogen B) Nitrogen C) Oxygen D) Silicon
Correct option is C Explanation: Silicate minerals make up more than 90% of the earth's crust. Feldspars and alkali feldspar are the most common silicates. Other common silicate minerals include...
Diethyl amine when treated with nitrous acid yields A) Diethyl ammonium nitrite B) Ethyl alcohol C) N-nitroso diethyl amine D) Triethyl ammonium nitrite
Correct option is C) N-nitroso diethyl amine Explanation: N-nitroso diethylamine is formed by treating diethylamine with nitrous acid. It's a strong carcinogen.
Potassium dichromate is a good oxidizing agent, in acidic medium the oxidation state of chromium changes by A) 2 B) 3 C) 4 D) 5
Correct option is B Explanation: Dichromate oxidizes to $\mathrm{Cr}^{+3}$ from $\mathrm{Cr}_{2} \mathrm{O}_{7}^{-2}$ in acidic medium according to the reaction $ \mathrm{Cr}_{2}...
Which metal among the followings has the highest packing efficiency ? A) Iron B) Tungsten C) Aluminium D) Polonium
Correct option is C Explanation: The packing efficiency is the fraction of volume occupied by constituent particles in a crystal structure (volume of space occupied by the spheres/total volume). The...
Which of the following compounds has highest boiling point ? A) Propan-1-ol B) n-Butane C) Chloroethane D) Propanal
Correct option is A) Propan-1-ol Explanation: Hydrogen bonds have the potential to occur in propan-1-ol. Because of the strongly E.N oxygen atom, intermolecular hydrogen bonding develop in...
How is ore of aluminium concentrated ? A) roasting B) leaching C) froth floatation D) using Wilfley table
B is the correct answer. Explanation: The leaching method concentrates aluminium ore. Impurities in aluminium ore include SiO2, iron oxides, and titanium oxide. The powdered ore is digested with a...
Which of the following compounds is most acidic in nature ? A) 4-Chlorobutanoic acid B) 3-Chlorobutanoic acid C) 2-Chlorobutanoic acid D) Butanoic acid
The correct answer is C(2-chlorobutanoic acid) In nature, 2-chlorobutanoic acid is the most acidic. Because there is an electron withdrawing group (Cl) next to the carboxylic acid group (COOH). As a...
Van’t Hoff factor of centimolal solution of is Calculate the percent dissociation of A) B) C) 78 D)
Correct option is C Explanation: $ \mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right] \rightarrow 3 \mathrm{~K}^{+}+\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-} $ $ \mathrm{i}=\alpha...
Replacement of diazonium group by fluorine is known as A) Gattermann reaction B) Sandmeyer reaction C) Balz-Schiemann reaction D) Etard reaction
Correct option is C Balz-Schiemann reaction Explanation: The Balz- Schiemann reaction is a chemical reaction in which anilines are transformed to aryl fluorides via diazonium fluoroborates....
If and represent molar mass of solute, mass of solute and volume of solution in litres respectively, which among following equations is true? A) B) C) D)
Correct option is C $\pi=\frac{\mathrm{TWR}}{\mathrm{VM}}$ $\pi=$ CRT where $\mathrm{C}$ is the concentration $\mathrm{C}=\frac{\text { Moles of solute }}{\text { volume }}$...
The correct IUPAC name of A) Triammine trinitrito – N cobalt (III) B) Triammine trinitrito cobalt (II) C) Triammine cobalt (III) nitrite D) Triammine trinitrito – N cobaltate (III)
Correct option is A) Triammine trinitrito - N cobalt Triammine trinitro-N-cobalt is the correct IUPAC name (III). In this scenario, the groups are ordered alphabetically, with the ammine group...
Electronic configuration of only one P block element is exceptional. One molecule of that element consists of how many atoms of it ? A) One B) Two C) Three D) Four
The best option is A Explanation: An only p-block element's electrical arrangement is uncommon. There is only one atom of that element in each molecule. Because helium has the electrical...
Which of the following is the most stable diazonium salt ? A) B) C) D)
Correct option is B Due to resonance stabilisation between the benzene nucleus and the nitrogen atom, dizonium salts with an aryl group immediately connected to the nitrogen atom are the most...
Which polymer among the following polymers does NOT soften on heating ? A) Bakelite B) Polythene C) Polystyrene D) PVC
The correct option is A Explanation: Thermoplastic is a plastic material that can be melted and moulded repeatedly by just heating it. When heated, thermoplastics soften and become moldable. They...
The relationship between rate constant and half life period of zero order reaction is given by A) B) C) D)
Correct option is C $\mathrm{t}_{1 / 2}=\frac{\left[\mathrm{A}_{0}\right]}{2 \mathrm{k}}$ The relationship between rate constant and half-life period of zero-order reaction is given by: $...
Identify a ‘Chemical twin’ among the followings. A) Zr-Ta B) Nb-Tc C) Hf-Re D) Nb-Ta
D is the correct answer. Nb−Ta Chemical twins are those in which some elements' characteristics are identical. Zr and Hf have comparable atomic sizes, as do Nb and Ta. This is related to the...
Chlorination of ethane is carried out in presence of A) anhydrous AlBr3 B) mercuric chloride C) ultraviolet light D) zinc chloride
Correct option is C) ultraviolet light Chlorination of ethane is carried out in the presence of Ultraviolet light to form 1,2-hexachloro ethane.
Which among the following is a tranquilizer ? A) Aspirin B) Valium C) Penicillin D) Sulphanilamide
Correct option is B) Valium A tranquillizer is a medicine that causes people and animals to become calm. Anxiety disorders, alcohol withdrawal symptoms, and muscular spasms are all treated with...
Which among the following alloys is used in making instruments for electrical measurements ? A) Stainless steel B) Manganin C) Spiegeleisen D) Duralumin
Correct option is B) Manganin Manganin foil and wire are employed in the production of resistors, notably ammeter shunts, due to its low temperature coefficient of resistance and long-term...
What is the amount of work done when two moles of ideal gas is compressed from a volume of 1 m3 to 10 dm3 at 300 K against a pressure of 100 kPa ? A) 99 kJ B) – 99 kJ C) 114.9 kJ D) – 114.9 kJ
Correct option is A $99 \mathrm{~kJ}$ $ \mathrm{V}_{1}=1 \mathrm{~m}^{3} $ Pressure $=100 \mathrm{kPa}=100000 \mathrm{~Pa}$ $\mathrm{V}_{2}=10 \mathrm{dm}^{3}=(1 / 100) \mathrm{m}^{3}$ So, $W=P...
What is the possible number of monohydroxy derivatives of a hydrocarbon consisting of five carbon atoms with one methyl group as a branch ? A) 2 B) 3 C) 4 D) 5
Correct option is B Only three isomers of mono hydroxy derivatives of a hydrocarbon with five carbon atoms and one methyl group as a branch are feasible.
Molarity is defined as A) the number of moles of solute dissolved in one dm3 of the solution B) the number of moles of solute dissolved in 1 kg of solvent C) the number of moles of solute dissolved in 1 dm3 of the solvent D) the number of moles of solute dissolved in 100 ml of the solvent
Correct option is (A) The number of moles of solute dissolved in 1dm3 of the solution is called molarity. Molarity = (moles of solute dissoved) / (volume of solvent in dm3) So, answer is...
Which among the following is a feature of adiabatic expansion ? A) ΔV < 0 B) ΔU < 0 C) ΔU > 0 D) ΔT = 0
Correct option is D) ΔT = 0 T=0 for adiabatic expansion. An ideal gas is enclosed in an insulated container and then allowed to expand in a vacuum for adiabatic free expansion. The work done by or...
Half life period of a first order reaction, A→ product is 6.93 hour. What is the value of rate constant ? A) 1.596 h–1 B) 0.1 h–1 C) 4.802 h–1 D) 10 h–1
Correct option is B ($0.1 \mathrm{~h}^{-1}$) We know, $ \mathrm{t}_{\frac{1}{2}}=\frac{0.693}{\mathrm{k}} $ where $t_{\frac{1}{2}}$ is the half life and $\mathrm{k}$ is rate constant. $...
During conversion of glucose into glucose cyanohydrin, what functional group/atom of glucose is replaced ? A) hydrogen B) aldehydic group C) primary alcoholic group D) secondary alcoholic group
Correct option is B Aldehydic group Glucose reacts with hydrogen cyanide to form glucose cyanohydrin. In this reaction functional group is replaced that is −CHO group.
Reaction of which among the following ethers with HI in cold leads to formation of methyl alcohol ? A) ethyl methyl ether B) methyl propyl ether C) isopropyl methyl ether D) tert-butyl methyl ether
Correct option is D) tert-butyl methyl ether
Which among the following detergents is non-ionic in character ? A) Sodiumlauryl sulphate B) Pentaerythrityl stearate C) Cetyltrimethyl ammonium chloride D) Sodium n-dodecyl benzene sulphonate
B is the correct answer. Pentaerythrityl stearate is a kind of stearic acid. The uncharged, hydrophilic headgroups of non-ionic detergents distinguish them from ionic detergents. Polyoxyethylene or...
What oxoacid of sulphur contains S-S bond in its structure ? A) Disulphurous acid B) Disulphuric acid C) Perdisulphuric acid D) Hydrosulphurous acid
Correct option is (A)Disulphurous acid Disulphurous acid(H2S2O5) contain S-S bond in its structure.
Identify the invalid equation.
(A) $\vartriangle $H = $\sum $H products - $\sum $Hreactants (B) $\vartriangle $H = $\vartriangle $U + P$\vartriangle $V (C) $\vartriangle $ HOreaction = $\sum $H0(product bonds) - $\sum...
Calculate the work done during compression of 2 mol of ideal gas from a volume of 1m3 to10dm3 at 300 K against a pressure of 100 Kpa.
(A)‑ 99 kJ (B) + 99 kJ (C)+ 22.98 kJ (D)‑ 22.98 kJ Correct Answer: (B) + 99 kJ Explanation: Formula Used - W=−2.303nRTlogV2/V1
Which element among the following does form Pπ−Pπ multiple bonds?
(A)Arsenic (B) Nitrogen (C)Phosphorus (D)Antimony Correct Answer: (B) Nitrogen Explanation: The element Nitrogen form Pπ−Pπ multiple bonds.
Tert‑butyl methyl ether on treatment with hydrogen iodide in cold gives
(A) tert‑butyl iodide and methyl iodide (B) tert‑butyl alcohol and methyl alcohol (C) tert‑butyl alcohol and methyl iodide (D) tert‑butyl iodide and methyl alcohol Correct Answer: (D)...
Name the process that is employed to refine aluminum.
(A) Hallʹs process (B) Mond process (C) Hoopeʹs process (D) Serperckʹs process Correct Answer: (C) Hoopeʹs process Explanation: Hoopeʹs process is the process that is employed to refine...
The colour and magnetic nature of manganate ion (MnO42-) is
(A) green, paramagnetic (B) purple, diamagnetic (C) green, diamagnetic (D) purple, paramagnetic Correct Answer: (A) green, paramagnetic Explanation:...
The osmotic pressure of solution containing 34.2 g of cane suger (molar mass =342 mol-1 ) in 1L of solution at is (Given, R = 0.082 L atm K-1 mol-1 )
(A)2.40 atm (B) 3.6 atm (C)24 atm (D)0.0024 atm Correct Answer: (A)2.40 atm Explanation: Calculation – $\begin{array}{l} \pi = CRT = \frac{W}{{M \times V}}RT\\ \pi =...
In assigning R‑S configuration which among the following group has highest priority?
(A)-SO3H (B) -COOH (C) -CHO (D)-C6H5 Correct Answer: (A) -SO3H Explanation: The decreasing order of priority is -SO3H > −COOH > −CHO > −C6H5
Which among the following equations represents the reduction taking place in lead accumulator at positive electrode, while it is being used as source of electrical energy?
(A) Pb Pb2+ (B) Pb4+ Pb (C) Pb2+ Pb (D) Pb4+ Pb2+ Correct Answer: (D) Pb4+ Pb2+ Explanation: Reaction Involved – PbO2(s) + 4H+(aq) + SO42-(aq) + 2e- → PbSO4(s) +...
For which among the following equimolar aqueous solution Vanʹt Hoff factor has the lowest value?
(A) Aluminum Chloride (B) Potassium Sulphate (C) Ammonium Chloride (D) Urea Correct Answer: (D) Urea Explanation: Urea is non-electrolyte and does not dissociate in aqueous solution and so...
The amino acid which is basic in nature is
(A) Histidine (B) Tyrosine (C) Proline (D) Valine Correct Answer: (A)Histidine Explanation: Histidine is the amino acid that is basic in nature.
Which element among the following does not form diatomic molecules?
(A) Argon (B) Oxygen (C) Nitrogen (D) Bromine Correct Answer: (A)Argon Explanation: The element Argon is a noble gas so it does not form diatomic molecules.
A molecule of Stachyose contains how many carbon atoms?
(A)6 (B) 12 (C) 18 (D) 24 Correct Answer: (D)24 Explanation:
What of the SI unit of conductivity?
(A) Sm (B) Sm-1 (C) Sm2 (D) Sm-2 Correct Answer: (B) Sm-1 Explanation: The SI unit of conductivity is Sm-1
Which of the following is Baeyerʹs reagent?
(A) alkaline KMnO4 (B) acidic K2Cr2O7 (C) alkaline Na2Cr2O7 (D) MnO2 Correct Answer: (A) alkaline KMnO4 Explanation: The alkaline KMnO4 is the Baeyerʹs reagent.
What is the chief constituent of Pyrex glass?
(A) B2O3 (B) SiO2 (C) Al2O3 (D) Na2O Correct Answer: (B) SiO2 Explanation: SiO2 is the chief constituent of Pyrex glass.
Which of the following compounds has lowest boiling point?
(A) n‑butyl alcohol (B) isobutyl alcohol (C) tert‑butyl alcohol (D) sec‑butyl alcohol Correct Answer: (C) Tert‑butyl alcohol Explanation: Tert‑butyl alcohol is the compound that has the...
The rate constant for a first order reaction is 7.0 X 10-4s-1. If initial concentration of reactant is 0.080M, what is the half-life of reaction?
(A) 990S (B) 79.2S (C) 12375S (D)10.10x10-4s Correct Answer: (A) 990S Explanation: Calculation – Half-life period, t1/2 = 0.693/k The half-life period t1/2 = 0.693/7.0 X 10-4s-1 t1/2...
The polymer used in making handles of cookers and frying pans is
(A) Bakelite (B) nylon‑2‑nylon‑6 (C) orlon (D) polyvinyl chloride Correct Answer: (A) Bakelite Explanation: Bakelite is the...
What is the actual volume occupied by water molecules present in 20 cm3 of water?
(A) 20 cm3 (B) 10 cm3 (C) 40 cm3 (D) 24.89 dm3 Correct Answer: (D) 24.89 dm3 Explanation: The actual volume occupied by water molecules present in 20 cm3 of water is...
Which of following coordinate complexes is an exception to EAN rule? (Given At. No. Pt = 78, Fe = 26, Zn = 30, Cu = 29)
(A)[Pt(NH3)6]4+ (B)[Fe(CN)6]4- (C)[Zn(NH3)4]2+ (D)[Cu(NH3)4]2+ Correct Answer: D)[Cu(NH3)4]2+ Explanation: Calculation – EAN = Z – X + Y EAN = 29 − 2 + 8 = 35 The atomic number of nearest...
Which of the following statements is incorrect in case of Hofmann bromamide degradation?
(A) Reaction is useful for decreasing length of carbon chain by one carbon atom (B) It gives tertiary amine (C) It gives primary amine (D) Aqueous or alcoholic KOH is used with bromine ...
Which of the following statements is INCORRECT for pair of elements Zr ‑ Hf?
(A) Both possess same number of valence electrons. (B) Both have identical atomic sizes (C) Both have almost identical ionic radii (D) Both of these belong to same period of periodic table ...
Aldehydes or ketones when treated with C6H5-NH- NH2 the product formed is
(A) semi carbazone (B) phenylhydrazone (C) hydrazone (D) oxime Correct Answer: (B) phenylhydrazone Explanation: Aldehydes or ketones when treated with C6H5-NH- NH2...
Solubility of which among the following solids in water changes slightly with temperature?
(A) KNO3 (B) NaNO3 (C) KBr (D) NaBr Correct Answer: (D) NaBr Explanation: The solubility of the solid, NaBr in water changes slightly with temperature.
What is the quantity of hydrogen gas liberated when 46 g sodium reacts with excess ethanol? (Given At. mass of Na = 23)
(A) 2.4 x 10-3kg (B) 2.0 x 10-3kg (C)4.0 x 10-3 kg (D)2.4 x 10-2 kg Correct Answer: (B) 2.0 x 10-3kg Explanation: 2.0 x 10-3kg is...
Identify the weakest oxidizing agent among the following.
(A) Li+ (B)Na+ (C)H2Se (D)H2Te Correct Answer: A) Li+ Explanation: Li+ is the weakest oxidizing agent.
The monomers used in preparation of dextron are
(A) lactic acid and glycolic acid (B) 3 ‑ Hydroxy butanoic acid and 3 ‑ Hydroxy pentanoic acid (C) styrene and 1, 3 ‑ Butadiene (D) hexamethylenediamine and adipic acid Correct Answer:...
Which among the following compounds does not act as a reducing agent?
(A) H2O (B) H2S (C) H2Se (D)H2Te Correct Answer: (A) H2O Explanation: The water H2O is the compound that do not act as a reducing agent.
Which of the following processes is not used to preserve the food?
(A) Irradiation (B) Addition of salts (C) Addition of heat (D) Hydration Correct Answer: (D) Hydration Explanation: Hydration is not used to preserve food.
In case of substituted aniline the group which decreases the basic strength is
(A)-OCH3 (B) -CH3 (C) –NH2 (D) –C6H5 Correct Answer: (D) –C6H5 Explanation:...
Which among the following equations represents Arrhenius equation?
(A) k =AeEa/RT (B)K= AeRT/Ea (C) k =A/eEa/RT (D)K=A/eRT/Ea Correct Answer: (C) k =A/eEa/RT Explanation: The equation that represents Arrhenius equation is k =A/eEa/RT
Which of the following compounds will give positive idoform test?
(A) Isopropyl alcohol (B) Propionaldehyde (C) Ethyl phenyl ketone (D) Benzyl alcohol Correct Answer: (B) Propionaldehyde Explanation: Propionaldehyde is the compound that give possible...
The first law of thermodynamics for isothermal process is
(A) q=-W (B) U=q (C) U=q (D) U=-qe Correct Answer: (A) q=-W Explanation: The first law of thermodynamics for isothermal process is q=-W
The conversion of ethyl bromide to ethyl iodide using sodium iodide and dry acetone, this reaction is known as
(A) Swarts reaction (B) Finkelstein reaction (C) Sandmeyer reaction (D) Stephen reaction Correct Answer: (B) Finkelstein reaction Explanation:...
What is the hybridization of carbon atoms in fullerene?
(A) sp3 (B) sp (C) sp3 (D) dsp3 Correct Answer: (C) sp3 Explanation: sp3 is the hybridization of carbon atoms in fullerene.
Which of the following is used as antiseptic?
(A) Chloramphenicol (B) Bithional (C) Cimetidine (D) Chlordiazepoxide Correct Answer: (B) Bithional Explanation: Bithional is used as an antiseptic.
In preparation of sulphuric acid from sulphur dioxide in lead chamber process. What substance is used as a catalyst?
(A) Mangenese dioxide (B) Vandadium pentoxide (C) Nitric oxide (D) Reney Nickel Correct Answer: (C) Nitric oxide Explanation: Nitric oxide is the catalyst that is used in the preparation...
The correct charge on and co‑ordination number of ‘Fe’ in K3[Fe(Cn)6] is
(A)+2, 4 (B) +3, 6 (C)+2, 6 (D)+3, 3 Correct Answer: (B) +3, 6 Explanation: The correct charge on and co‑ordination number of ‘Fe’ in K3[Fe(Cn)6]...
Which among the following reactions is an example of pseudo first order reaction?
(A) Inversion of cane sugar. (B) Decomposition of H2O2 (C) Conversion of cyclopropane to propane (D) Decomposition of N2O5 Correct Answer: (A) Inversion of cane sugar Explanation:...
The amine which reacts with p ‑ toluencsulphonyl chloride to give a clear solution which on acidification give insoluble compound is
(A)C2H5NH2 (B)(C2H5)2NH (C)(C2H5)3N (D)CH3NHC2H5 Correct Answer: (A)C2H5NH2 Explanation: The amine which reacts with p ‑ toluencsulphonyl chloride to give a clear solution which on...
The work done during combustion of 9 x 10-2 kg of ethane, C2H6(g) at 300 K is (Given R=8.314J deg-1 mol-1 atomic mass C=12, H= 1)
(A) 6.236 KJ (B) -6.236KJ (C) 18.71KJ (D) -18.71KJ Correct Answer: (A) 6.236 KJ Explanation: The work done during combustion of 9 x 10-2 kg of ethane, C2H6(g) at 300 K is 6.236...
What type of sugar molecule is present in DNA?
(A) D‑3‑deoxyribose (B) D‑ribose (C) D‑2‑deoxyribose (D) D‑Glucopyranose Correct Answer: (B) D‑ribose Explanation: D‑ribose is a sugar molecule that is present in the...
The molality of solution containing 15.20 g of urea, (molar mass = 60) dissolved in 150 g of water is
(A) 1.6889 mol kg-1 (B) 0.1689 mol kg-1 (C) 0.5922 mol kg-1 (D) 0.2533 mol kg-1 Correct Answer: (A) 1.6889 mol kg-1 Explanation:...
The acid which contains both ‑OH and ‑COOH groups is
(A) phthalic acid (B) adipic acid (C) glutaric acid (D) salicylic acid Correct Answer: (D) salicylic acid Explanation: The acid which contains both ‑OH and ‑COOH groups is...
Identify the compound in which phosphorus exists in the oxidation state of +1.
(A) Phosphonic acid (H3PO3) (B) Phosphinic acid (H3PO2) (C) Pyrophosphorus acid (H4P2O5) (D) Orthophosphoric acid (H3PO4) Correct Answer: (B) Phosphinic acid (H3PO2) Explanation:...
(+) 2‑ Methylbutan ‑1‑ol and (‑)2‑Methylbutan‑1‑ol have different values for which property?
(A) Boiling point (B) Relative density (C) Refractive index (D) Specific rotation Correct Answer: (D) Specific rotation Explanation:...
Which among the following is not a mineral of iron?
(A)Haematite (B) Magnesite (C)Magenetite (D)Siderite Correct Answer: (B) Magnesite Explanation: Magnesite is not a mineral of iron.
Nitration of which among the following compounds yields cyclonite?
(A) Formaldehyde (B) benzaldehyde (C) Urotropine (D) Acetaldehyde ammonia Correct Answer: (A) Formaldehyde Explanation: The nitration of the compound formaldehyde yields...
How is sodium chromate converted into sodium dichromate in the manufacture of potassium dichromate from chromite ore?
A) By the action of concentrated sulphuric acid B) By roasting with soda ash C) By the action of sodium hydroxide D) By the action of lime stone Correct Answer: A) By the action of...
In dry cell, what acts as negative electrode?
A) Zinc B) Graphite C) Ammonium chloride D) Manganese dioxide Correct Answer: A) Zinc Explanation: Zinc-carbon battery is a dry cell battery between a zinc metal electrode and a carbon fiber...
Select the compound which on treatment with nitrous acid liberates nitrogen.
A) Nitroethane B) Triethylamine C) Diethylamine D) Ethylamine Correct Answer: D) Ethylamine Explanation: Ethylamine is the compound which on treatment with nitrous acid liberates nitrogen....
5.0 g of sodium hydroxide (molar mass 40 g mol-1) is dissolved in little quantity of water and the solution is diluted up to 100 ml. What is the molarity of the resulting solution?
A) 0.1 mol dm -3 B) 1.0 mol dm-3 C) 0.125 mol dm-3 D) 1.25 mol dm-3 Correct Answer: D) 1.25 mol dm-3 Explanation: Calculation - Moles of solute is 5/40 => 0.125 moles Volume of the...
Which of the following compounds when treated with dibenzyl cadmium yields benzyl methyl ketone?
A) Acetone B) Acetaldehyde C) Acetic acid D) Acetyl chloride Correct Answer: D) Acetyl chloride Explanation: Acetyl chloride is the compound when treated with dibenzyl cadmium yields benzyl...
Which halide of magnesium has highest ionic character?
A) Chloride B) Bromide C) Iodide D) Fluoride Correct Answer: D) Fluoride Explanation: Fluoride is the halide of magnesium has highest ionic character.
The reaction takes place in two steps as
i) NO2Cl(g) ⎯k1→ NO2 (g) + Cl (g) ii) NO2Cl(g) + Cl (g) ⎯k2⎯→ NO2 (g) + Cl2 (g) Identify the reaction intermediate A) NO2Cl(g) B) NO2 (g) C) Cl2 (g) D) Cl (g) Correct Answer: D) Cl (g)...
Which of the following amino acids is basic in nature?
A) Valine B) Tyrosine C) Arginine D) Leucine Correct Answer: C) Arginine Explanation: Arginine is the amino acids that is basic in nature.
Which among the following phenolic compounds is most acidic in nature?
A) p-aminophenol B) phenol C) m-nitrophenol D) p-nitrophenol Correct Answer: D) p-nitrophenol Explanation: p-nitrophenol is the phenolic compounds is most acidic in nature.
The relation between solubility of a gas in liquid at constant temperature and external pressure is stated by which law?
A) Raoult’s law B) van’t Hoff Boyle’s law C) van’t Hoff Charles’ law D) Henry’s law Correct Answer: D) Henry’s law Explanation: Henry’s law is the law that states the relation between...
Which among the following solids is a nonpolar solid?
A) Hydrogen chloride B) Sulphur dioxide C) Water D) Carbon dioxide Correct Answer: D) Carbon dioxide Explanation: Carbon dioxide is a nonpolar solid. The bonds that are part of the ionic are...
Identify the metal that forms colourless compounds.
A) Iron (Z = 26) B) Chromium (Z = 24) C) Vanadium (Z = 23) D) Scandium (Z = 21) Correct Answer: D) Scandium (Z = 2) Explanation: Scandium (Z = 2) is the metal that forms colourless...
What is the highest oxidation state exhibited by group 17 elements?
A) + 1 B) + 3 C) + 5 D) + 7 Correct Answer: D) + 7 Explanation: The highest oxidation state exhibited by group 17 element is +7.
Mathematical equation of first law of thermodynamics for isochoric process is
A) ΔU=qv B) −ΔU =qv C) q =−W D) ΔU=W Correct Answer: A) ΔU=qv Explanation: The mathematical equation of first law of thermodynamics for isochoric process is ΔU=qv
Name the catalyst used in commercial method of preparation of phenol.
A) Silica B) Calcium phosphate C) Anhydrous aluminium chloride D) Cobalt naphthenate Correct Answer: D) Cobalt naphthenate Explanation: Cobalt naphthenate is the catalyst that is used in...
The rate constant and half-life of a first order reaction are related to each other as
A) t1/2=0.693/K B) t1/2=0.693K C) K=0.693 t1/2 D) K t1/2=1/0.693 Correct Answer: A) t1/2=0.693/K Explanation: The rate constant and half-life of a first order reaction are related to each...
What is the combining ratio of glycerol and fatty acids when they combine to form triglyceride?
A) 3 : 4 B) 3 : 2 C) 1 : 3 D) 1 : 2 Correct Answer: C) 1 : 3 Explanation: The combining ratio of glycerol and fatty acids when they combine to form triglyceride is 1 : 3.
The molecular formula of Wilkinson catalyst, used in hydrogenation of alkenes is
A) Co (CO)8 B) (Ph3P)3 RhCl C) [Pt (NH3)2 Cl2] D) K [Ag (CN)2] Correct Answer: B) (Ph3P)3 RhCl Explanation: The molecular formula of Wilkinson catalyst which is used in hydrogenation of...
The criterion for a spontaneous process is
A) ΔG>0 B) ΔG< 0 C) ΔG=0 D) ΔSTotal<0 Correct Answer: B) ΔG< 0 Explanation: The criterion for a spontaneous process is ΔG< 0
Brown ring test is used for detection of which radical?
A) Ferrous B) Nitrite C) Nitrate D) Ferric Correct Answer: C) Nitrate Explanation: Brown ring test is used for detection of Nitrate.
The reagent used in Wolff-Kishner reduction is
A) NH2 – NH2 and KOH in ethylene glycol B) Zn – Hg/conc.HCl C) NaBH4 D) Na – Hg/H2O Correct Answer: A) NH2 – NH2 and KOH in ethylene glycol Explanation: The reagent used in Wolff-Kishner...
Which of the following is a neutral complex?
A) [Pt (NH3)2 Cl2] B) [Co (NH3)6] Cl3 C) [Ni (NH3)6] Cl2 D) K4 [Fe (CN)6] Correct Answer: A) [Pt (NH3)2 Cl2] Explanation: [Pt (NH3)2 Cl2] is a neutral complex.
Identify the compound amongst the following of which 0.1 M aqueous solution has highest boiling point.
A) Glucose B) Sodium chloride C) Calcium chloride D) Ferric chloride Correct Answer: D) Ferric chloride Explanation: Ferric chloride is the compound in which 0.1M aqueous solution has the...
What is the reagent used in Etard reaction?
A) Chromyl chloride B) Ethanoyl chloride C) SnCl2 and HCl D) Cadmium chloride Correct Answer: A) Chromyl chloride Explanation: Chromyl chloride is the reagent used in Etard...
The most abundant noble gas in atmosphere is
A) Neon B) Argon C) Xenon D) Krypton Correct Answer: B) Argon Explanation: Argon is the most abundant noble gas in the atmosphere.
Identify an extensive property amongst the following
A) Viscosity B) Heat capacity C) Density D) Surface tension Correct Answer: B) Heat capacity Explanation: Heat capacity is an extensive property.
Which of the following carboxylic acids is a tricarboxylic acid?
A) Oxalic acid B) Citric acid C) Succinic acid D) Adipic acid Correct Answer: B) Citric acid Explanation: Citric acid is a weak tricarboxylic acid that occurs mostly in the citrus...
Average rate of reaction 2 SO2 (g) + O2 (g) ⎯→ 2 SO3 (g) is written as
A) Δ[SO2]/ Δt B) – Δ[O2]/ Δt C) ½ Δ[SO2]/ Δt D) Δ[SO3]/ Δt Correct Answer: B) – Δ[O2]/ Δt Explanation: Average rate of reaction 2 SO2 (g) + O2 (g) ⎯⎯ → 2 SO3 (g) is written as – Δ[O2]/...
What is the amount of work done when 0.5 mole of methane, CH4 (g), is subjected to combustion at 300 K? (given, R = 8.314 J K-1 mol-1)
A) – 2494 J B) – 4988 J C) + 4988 J D) + 2494 J Correct Answer: D) + 2494 J Explanation: Using the formula W = −PΔV, + 2494 J is the amount of work done when 0.5 mole of methane, CH4 (g), is...
Primary nitroalkanes are obtained in good yield by oxidising aldoximes with the help of
A) trifluoro peroxyacetic acid B) acidified potassium permanganate C) concentrated nitric acid D) potassium dichromate and dilute sulphuric acid Correct Answer: A) trifluoro peroxyacetic acid...
If ‘n’ represents total number of asymmetric carbon atoms in a compound, the possible number of optical isomers of the compound is
A) 2n B) n2 C) 2n D) 2n + 2 Correct Answer: C) 2n Explanation: General formula for calculating stereoisomer - 2n, where n is the number of chiral centers. The stereoisomers have same chemical...
Which is the most stable allotrope of Sulphur?
A) Octahedral sulphur B) Monoclinic Sulphur C) Plastic Sulphur D) Colloidal Sulphur Correct Answer: A) Octahedral sulphur Explanation: Sulfur mainly exists in two types of allotropes: Rhombic...
Correct statement for thermoplastic polymer is
A) It does not become soft on heating under pressure B) It cannot be remolded C) It is either linear or branched chain polymer D) It is cross-linked polymer Correct Answer: C) It is either...
How many Faradays of electricity are required to deposit 10 g of calcium from molten calcium chloride using inert electrodes? (molar mass of calcium = 40 g mol-1)
A) 0.5 F B) 1 F C) 0.25 F D) 2 F Correct Answer: A) 0.5 F Explanation: Reaction Involved – Ca2+ + 2e- Ca Calculation - Number of moles of Ca = $\frac{{10g}}{{40g/mol}}$ => 0.25mol...
Name the reagent that is used in leaching of gold
A) Carbon B) Sodium cyanide C) Carbon monoxide D) Iodine Correct Answer: B) Sodium cyanide Explanation: Sodium cyanide is the reagent that is used in leaching of gold.
Which of the following is an analgesic?
A) Ofloxacin B) Penicillin C) Aminoglycosides D) Paracetamol Correct Answer: D) Paracetamol Explanation: Paracetamol is an analgesic.
The compound which is not formed when a mixture of n-butyl bromide and ethyl bromide treated with sodium metal in presence of dry ether is
A) Butane B) Octane C) Hexane D) Ethane Correct Answer: D) Ethane Explanation: The compound which is not formed when a mixture of n-butyl bromide and ethyl bromide treated with sodium metal...
What is the general molecular formula of the products obtained on heating lanthanoids (Ln) with Sulphur?
A) LnS B) LnS3 C) Ln3S2 D) Ln2S3 Correct Answer: D) Ln2S3 Explanation: Reaction Involved – 2Ln + 3S Ln2S3
Butylated hydroxy anisole is
A) an anti-oxidant B) cleansing agent C) disinfectant D) an antihistamine Correct Answer: A) an anti-oxidant Explanation: Butylated hydroxy anisole is an anti-oxidant.
In the cell represented by Pb(1) |Pb2+ (1M)||Ag+(1), the reducing agent is
A) Pb B) Pb2+ C) Ag D) Ag+ Correct Answer: A) Pb Explanation: Reaction Involved – Pb Pb2+ + 2e-
Which metal crystallizes in a simple cubic structure?
A) Polonium B) Copper C) Nickel D) Iron Correct Answer: A) Polonium Explanation: Polonium is the metal that crystallizes in a simple cubic structure.
The amine ‘A’ when treated with nitrous acid gives yellow oily substance. The amine A is
A) trimethylamine B) trimethylamine C) aniline D) methyl phenylamine Correct Answer: D) methyl phenylamine Explanation: Reaction Involved: Ph – NH – CH3 + OH – N = O Ph – N(CH3) – N = O +...
The element that does not form acidic oxide is
A) Carbon B) Phosphorus C) Chlorine D) Barium Correct Answer: D) Barium Explanation: Barium is the element that does not form acidic oxide.
While assigning R, S configuration the correct order of priority of groups attached to chiral carbon atom is
A) CONH2 > COCH3 > CH2OH > CHO B) CONH2 > COCH3 > CHO > CH2OH C) COCH3 > CONH2 > CHO > CH2OH D) CHO > CH2OH > COCH3 > CONH2 Correct Answer: B) CONH2 >...
Bulletproof helmets are made from
A) Lexan B) Saran C) Glyptal D) Thiokol Correct Answer: A) Lexan Explanation: Bulletproof helmets are made from Lexan.
Which metal is refined by Mond Process?
A) Titanium B) Copper C) Nickel D) Zinc Correct Answer: C) Nickel Explanation: Nickel is the metal which is refined by Mond process. Steps Involved: NiO(s) + H2(g) Ni(s) + H2O Ni(s) +...
Isopropyl methyl ether when treated with cold hydrogen iodide gives
A) isopropyl iodide and methyl iodide B) isopropyl alcohol and methyl iodide C) isopropyl alcohol and methyl alcohol D) isopropyl iodide and methyl alcohol Correct Answer: B) isopropyl...
In face centered cubic unit cell, what is the volume occupied?
A) 4/3 πr3 B) 8/3 πr3 C) 16/3 πr3 D) 64 πr3/3 Correct Answer: C) 16/3 πr3 Explanation: Calculation - In fcc unit cell, no. of atoms are = [6×1/2]+[8×1/8] => 4 Volume of 1 spherical atom...
Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms presence of
A) six carbon atoms linked in straight chain B) secondary alcoholic group in glucose C) aldehyde group in glucose D) primary alcoholic group in glucose Correct Answer: C) aldehyde group in...
The hydrolysis reaction that takes place at the slowest rate, among the following is
(1) (2) (3) H3C-CH2-Cl (aq. NaOH) H3C-CH2-OH (4) H3C=CH-CH2-Cl (aq. NaOH) H3C=CH-CH2-OH Correct Answer: (1) Explanation: The aryl halides do not give substitution reactions due to partial...
When vapors of a secondary alcohol is passed over heated copper at 573 K, the product formed is
(1) an alkene (2) a carboxylic acid (3) an aldehyde (4) a ketone Correct Answer: (4) a ketone Explanation:
The major products C and D formed in the following reaction respectively are
${{H}_{3}}C-C{{H}_{2}}-C{{H}_{2}}-O-C{{(C{{H}_{3}})}_{3}}\xrightarrow[\Delta ]{excessHI}C+D$ (1) H3C – CH2 – CH2 – OH and HO – C(CH3)3 (2) H3C – CH2 – CH2 – I and I – C(CH3)3 (3) H3C – CH2 – CH2–...
The pH of 0.01 M NaOH (aq) solution will be
(1) 9 (2) 7.01 (3) 2 (4) 12 Correct Answer: (4) 12 Explanation: [OH-] = [NaOH] = 0.01 M = 10-2 M pOH = –log[OH-] = –log(10-2) pH = 14 – pOH = 12
Which of the following cannot act both as Bronsted acid and as Bronsted base?
(1) HSO4- (2) HCO3- (3) NH3 (4) HCl Correct Answer: (4) HCl Explanation: The substance which can release and accept H+ can act as both Bronsted base and acid. HCl cannot accept H+...
The molar solubility of CaF2(Ksp = 5.3 × 10–11) in 0.1 M solution of NaF will be
(1) 5.3 × 10- 10 mol L-1 (2) 5.3 × 10-11 mol L-1 (3) 5.3 × 10-8 mol L-1 (4) 5.3 × 10-9 mol L-1 Correct Answer: (4) 5.3 × 10-9 mol L-1 Explanation: Calculation – Ksp(CaF2) = 5.3 × 10-11...
The oxidation state of Cr in CrO6 is
(1) +4 (2) –6 (3) +12 (4) +6 Correct Answer: (4) +6 Explanation: The most appropriate oxidation state of Cr in CrO6 is +6 although CrO6 has doubtful existence.
The number of hydrogen bonded water molecule(s) associated with CuSO4 . 5H2O is
(1) 5 (2) 3 (3) 1 (4) 2 Correct Answer: (3) 1 Explanation: The actual structure of CuSO4.5H2O is [Cu(H2O)4]SO4.H2O, so only one water molecule is associated with the molecule via hydrogen...
Formula of nickel oxide with metal deficiency defect in its crystal is Ni0.98O. The crystal contains Ni2+ and Ni3+ ions. The fraction of nickel existing as Ni2+ ions in the crystal is
(1) 0.31 (2) 0.96 (3) 0.04 (4) 0.50 Correct Answer: (2) 0.96 Explanation: Ni0.98 O (Ni2+ )x( Ni3+ )0.98-x( O2- )1 Net charge = 0 [X x 2]+ [ (0.98- x) 3]+ [-2x 1]= 0 x = 0.94 Fraction of...
Which of the following statements is correct regarding a solution of two components A and B exhibiting positive deviation from ideal behavior?
(1) Intermolecular attractive forces between A-A and B-B are equal to those between A-B. (2) Intermolecular attractive forces between A-A and B-B are stronger than those between A-B. (3) mixH = 0 at...
In water saturated air, the mole fraction of water vapour is 0.02. If the total pressure of the saturated air is 1.2 atm, the partial pressure of dry air is
(1) 0.98 atm (2) 1.18 atm (3) 1.76 atm (4) 1.176 atm Correct Answer: (4) 1.176 atm Explanation: Calculation - Mole fraction of water vapour = 0.02 Mole fraction of dry air = 1 – 0.02 = 0.98...
The standard electrode potential (E⊖) values of Al3+/Al, Ag+/Ag, K+/K and Cr3+/Cr are –1.66 V, 0.80 V, –2.93 V and –0.74 V, respectively. The correct decreasing order of reducing power of the metal is
(1) Al > K > Ag > Cr (2) Ag > Cr > Al > K (3) K > Al > Cr > Ag (4) K > Al > Ag > Cr Correct Answer: (3) K > Al > Cr > Ag Explanation: The lesser...
The liquified gas that is used in dry cleaning along with a suitable detergent is
(1) CO2 (2) Water gas (3) Petroleum gas (4) NO2 Correct Answer: (1) CO2 Explanation: Liquified CO2 (carbon dioxide) with a suitable detergent is used in dry cleaning.
The Crystal Field Stabilisation Energy (CFSE) for [CoCl6]4– is 18000 cm–1. The CFSE for [CoCl4]2– will be,
(1) 8000 cm-1 (2) 6000 cm-1 (3) 16000 cm-1 (4) 18000 cm-1 Correct Answer: (1) 8000 cm-1 Explanation: Formula Used - t = 4/9 o
When neutral or faintly alkaline KMnO4 is treated with potassium iodide, iodide ion is converted into ‘X’. ‘X’ is
(1) IO- (2) I2 (3) IO4- (4) IO3- Correct Answer: (4) IO3- Explanation: In neutral or faintly alkaline solutions, iodide ion is converted into iodate. Reaction Involved – 2MnO4- + H2O + I-...
Identify the correct formula of ‘oleum’ from the following.
(1) H2S2O8 (2) H2S2O7 (3) H2SO3 (4) H2SO4 Correct Answer: (2) H2S2O7 Explanation: The chemical formula of oleum is H2S2O7
Which of the following oxoacids of phosphorus has strongest reducing property?
(1) H3PO4 (2) H4P2O7 (3) H3PO3 (4) H3PO Correct Answer: (2) Ca3P2 Explanation: Hypo phosphorous acid is a good reducing agent as it contains two P–H bonds.
A compound ‘X’ upon reaction with H2O produces a colorless gas ‘Y’ with rotton fish smell. Gas ‘Y’ is absorbed in a solution of CuSO4 to give Cu3P2 as one of the products. Predict the compound ‘X’.
(1) Ca23(PO4)2 (2) Ca3P2 (3) NH4Cl (4) As2O Correct Answer: (2) Ca3P2 Explanation: Reactions Involved – Ca3P2 + 6H2O 3Ca(OH)2 + 2PH3 2PH3 3CuSO4 Cu3P2 +...
Identify the incorrect statement.
(1) Gangue is an ore contaminated with undesired materials (2) The scientific and technological process used for isolation of the metal from its ore is known as metallurgy (3) Minerals are naturally...
Which of the following compounds is used in cosmetic surgery?
(1) Zeolites (2) Silica (3) Silicates (4) Silicones Correct Answer: (4) Silicones Explanation: Silicones are usually used in cosmetic surgeries.
Aluminium chloride in acidified aqueous solution forms a complex ‘A’, in which hybridisation state of Al is ‘B’. What are ‘A’ and ‘B’, respectively?
(1) [Al(H2O)6]3+ , d2sp3 (2) [Al(H2O)6]3+ , sp3 d2 (3) [Al(H2O)6]3+ , sp3 (4) [Al(H2O)6]3+ , dsp2 Correct Answer: (2) [Al(H2O)6]3+ , sp3 d2 Explanation: Reaction Involved – AlCl3(acidified...
In the following reaction, H3C-C=CH (red hot iron tube at 873 K) →A, the number of sigma () bonds present in the product A, is
(1) 18 (2) 21 (3) 9 (4) 24 Correct Answer: (2) 21 Explanation:
The alkane that gives only one mono-chloro product on chlorination with Cl2 in presence of diffused sunlight is
(1) Isopentane (2) 2, 2-dimethylbutane (3) neopentane (4) n-pentane Correct Answer: (3) neopentane Explanation: The chlorination of neopentane with Cl2 in the presence of diffused sunlight...
The most stable carbocation, among the following, is
Correct Answer: Option (4) Explanation: The stability of carbocation depends upon the number of a-H because of +H effect that is the hyperconjugation effect.
Match the catalyst with the process
Catalyst Process (i) V2O5 (a) the oxidation of ethyne to ethanal (ii) TiCl4+ Al(CH3)3 (b)...
Match the oxide given in column A with its property given in column B
Column-A Column-B (i) Na2O (a) Neutral (ii) Al2O3 (b) Basic (iii) N2O (c) Acidic (iv) Cl2O7 (d)...
Reversible expansion of an ideal gas under isothermal and adiabatic conditions are as shown in the figure.
AB Isothermal expansion AC Adiabatic expansion. Which of the following options is not correct? (1) TC > TA (2) Sisothermal > Sadiabatic (3) TA = TB (4) wisothermal >...