1. 3n 2. n 3. 2n 4. n/2 Solution: 2n When two moles of ethyl bromide are combined with Sodium metal in the presence of dry ether, n-butane is formed. The reaction described above is known as the...
10σ and 3π bonds 12σ and 3π bonds 15σ and 3π bonds 6σ and 3π bonds Solution: 15σ and 3π bonds Toluene is C6H5CH3. No. of σ bonds is 15. No. of π bonds...
1. Histidine 2. Lysine 3. Arginine 4. Alanine Solution: Alanine Except Alanine all other amino acids contain - NH2 or - N atom in the side chain.
1. Zone refining 2. Polling 3. Liquation processes 4. Vapour phase refining Solution: Polling Poling is a crude metal refining technique that involves stirring molten metal in a ladle with a green...
1.5×10-2 kJ 1.5 kJ 150 kJ 1.5×10-3 kJ Solution: 1.5 kJ
g. mass of 1 mole of atoms is40 mol-1 32.31 mol-1 4.5 mol-1 36.13 mol-1 Solution: 36.13 mol-1 The mass of one atom of an element, A = 6.0 × 10−23 g We know, 1 mole of an atom is 6.023 × 1023 atoms. 1 mole of an atom = its...
1. Antimicrobial 2. tranquilizer 3. antioxidant 4. antirhuematic drug Solution: antirhuematic drug Aspirin, commonly known as acetylsalicylic acid (ASA), is a pain reliever, fever reducer, and...
1. Ethanal 2. Propanal 3. Propanone 4. Acetophenone Solution: Propanal Haloform reaction is given by the compounds containing acetyl groups (CH3CO−). All the given options...
Solution: Option 1 is correct
A. 2-hydroxy cyclohexanol B. Cyclohexene C. Benzene D. 2-Bromo cyclohexene Solution: Cyclohexene An alkene (cyclohexene) will be created in this case by dehydrating alcohol...
1. 0.085 2. 0.09 3. 0.08 4. 0.075 Solution: 0.08 The mole fraction is given as: $ {{X}_{solute}}=\frac{{{n}_{solute}}}{{{n}_{solute}}+{{n}_{solvent}}} $ $...
$ 1.\,\,7.22\,c{{m}^{3}} $ $ 2.\,\,1.38\times {{10}^{-1}}\,c{{m}^{3}} $ $ 3.\,\,2.38\times {{10}^{-2}}\,c{{m}^{3}} $ $ 4.\,\,3.023\times {{10}^{-2}}\,c{{m}^{3}} $ Solution: $ 1.\,\,7.22\,c{{m}^{3}}...
1. 1 → 6 β 2. 1 → 4 β 3. 1 → 6 α 4. 1 → 4 α Solution: 1 → 4 α Maltose is a disaccharide made up of alpha 1,4 glucose molecules linked together. Maltase is the enzyme that breaks it down. It acts on...
1M NaCl and 1M MgCl2 1.5M KCl and 2.5M Urea 1.5M AlCl3 and 2M Na2SO4 1M NaCl and 2M MgCl2 Solution: 1.5M AlCl3 and 2M Na2SO4 The osmotic pressure and molar concentration in isotonic solutions should...
1. 2 - chloropropanal 2. 2 - chloropentane 3. 2 - chloro,2-methylbutane 4. 2 - chlorobutane Solution: 2 - chloro,2-methylbutane 2-chloro-2-methylbutane is optically inactive as no chiral center is...
$ 1.\,\,{{\left[ Ni{{(CN)}_{4}} \right]}^{2-}} $ $ 2.\,\,[Ni{{(CO)}_{4}}] $ $ 3.\,\,{{\left[ CO{{(N{{H}_{3}})}_{6}} \right]}^{3+}} $ $ 4.\,\,{{[NiC{{l}_{4}}]}^{2-}} $ Solution: $...
1. -42.35 kJ 2. -169.4 kJ 3. -50.82 kJ 4. -236.7 kJ Solution: -169.4 kJ Given mass = 0.06 kg = 60 g Molar mass of ethane = 2(12) + 6(1) = 30 g number of moles of ethane in 60 grams = 60/30 = 2 We...
1. Temperature increases 2. Temperature decreases 3. Ea increases 4. Ea decreases Solution: Ea decreases A catalyst is a material that speeds up a reaction without being consumed in the process....
1. Buna-N 2. Neoprene 3. Butyl rubber 4. Buna-S Solution: Buna-S Styrene-butadiene rubber is another name for the rubber produced (SBR). Bu stands for butadiene, Na for sodium, and S for styrene in...
2 dm3 3 dm3 4 dm3 8 dm3 Solution: 4 dm3 From ideal gas equation, we have: $ \frac{{{P}_{1}}{{V}_{1}}}{{{T}_{1}}}=\frac{{{P}_{2}}{{V}_{2}}}{{{T}_{2}}} $ $ We\,have\,: $ $...
1. NCl5 is unstable 2. larger size of nitrogen 3. inertness of nitrogen 4. non-availability of vacant d- atomic orbitals Solution: non-availability of vacant d- atomic orbitals By employing the...
1. Reaction with calcium oxide 2. Reaction with sodium 3. Reaction with ammonia 4. Photosynthesis reaction Solution: Photosynthesis reaction The overall balanced equation of photosynthesis reaction...
1. Gabriel phthalamide synthesis 2. Nef carbonyl synthesis 3. Etard reaction 4. Hoffmann degradation Solution: Nef carbonyl synthesis Nef carbonyl synthesis Acid hydrolysis of a salt of a...
1. Violet 2. Yellow 3. Black 4. Prussian blue Solution: Prussian blue The reaction equation is: $ FeS{{O}_{4}}+NaOH\,\,\to \,\,Fe{{(OH)}_{2}}+N{{a}_{2}}S{{O}_{4}} $ $ 6NaCN+Fe{{(OH)}_{2}}\,\,\to...
Nd La Dy Yb Solution: La We have Z = 57 for La. In +3 oxidation state Lanthanum(La) achieves the noble gas configuration. So, Lanthanum exhibits only +3 oxidation state.
A. Eo increase three times B. Eo is unchanged C. Eo decreases three times D. Go remains unchanged Solution: Eo is unchanged $ Nernst's\text{ }equation\text{ }states~: $ $...
A. sp3d2 B. sp3d3 C. sp3d D. dsp2 Solution: sp3d2 PCl5 is expected to have a hybridization of sp3d and a shape of trigonal bipyramidal. But in solid-state PCl5 exists in ionic form...
B2O3 CO ZnO CaO Solution: ZnO Zinc oxide (ZnO) is known as amphoteric oxide because it has both acidic and basic properties.
1. Cyclo - sulphur 2. α - Sulphur 3. β - Sulphur 4. plastic sulphur Solution: Cyclo - sulphur
decreasing the concentration of KCl solution Increasing the quality of Hg2Cl2 decreasing the quantity of calomel Increasing the concentration of KCl solution Solution: decreasing the concentration...
1. 2412.5 C 2. 965 C 3. 4825 C 4. 9650 C Solution: 4825 C We have: Mass of one electron = 9.10×10−31 kg Charge of one electron = 1.602×10−19 coulomb $...
1. +2 2. +3 3. +4 4. +5 Solution: +5 Ammonium metavanadate, NH4VO3, is the most common source of vanadium in the +5 oxidation state. This isn't particularly water soluble, thus it's normally...
1. nucleophilic addition 2. nucleophilic substitution 3. electrophilic substitution 4. electrophilic addition Solution: electrophilic substitution Bromination is the reaction that is taking place...
. Identify the correct relation from the following relations:Solution: the correct option is A As the reaction progresses, the reactant concentration decreases and the product concentration rises. As a result, the rate of...
Solution: The correct option is 2. Hydride stability reduces as one moves along the group from NH3 to SbH3. This is because their bond dissociation enthalpy has decreased. The...
is1. Nature of solute only 2. Nature of the solute and the concentration of solution 3. Nature of the solvent and the concentration of solution 4. Nature of solvent only Solution: 3. Nature of the...
1. Ampere 2. 0C 3. Kelvin 4. Candela Solution: Candela The SI unit of luminous intensity is candela.
- 4.5 J 2×10-2 J - 506.5 J 225 J Solution: - 506.5 J The following equation can be used to describe the work done by a system against an external pressure: We know that: w = -Pext ∆V 1atm...
1. Dolomite 2. Siderite 3. China clay 4. Calamine Solution: China Clay $ Dolomite-[CaMg{{(C{{O}_{3}})}_{2}}] $ $ Siderite-[FeC{{O}_{3}}] $ $ China\text{ }Clay-[Al2{{O}_{3}}.2Si{{O}_{2}}.2{{H}_{2}}O]...
1. Tertiary alcohol 2. Secondary alcohol 3. Primary alcohol 4. Dihydric alcohol Solution: Primary alcohol The primary alcohols are those that have only one alkyl group linked to the carbon atom of...
1. Be 2. Mg 3. Sr 4. Ba Solution: Ba Because of its high reactivity, barium (Ba) is only found in nature in conjunction with other elements. Sulfate and carbonate are the most common compounds...
Solution: Option 1. is the correct answer Consider methyl bromide's alkaline hydrolysis to yield methanol. $ C{{H}_{3}}-Br+NaOH\,\,\xrightarrow{\Delta }\,\,C{{H}_{3}}-OH+NaBr $...
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Linkage Isomers Ionization Isomers Geometrical isomers Coordination isomers Solution: Ionization isomers When the same molecular formula produces distinct ions in a solution, this is known as...
H2 SO2 N2 O2 Solution: SO2 SO2 is an easily liquefiable gas and easily liquefiable gases are adsorbed to a greater extent than elemental gases like N2, O2, and H2.
$ 1.\,A{{l}_{2}}{{O}_{3}} $ $ 2.\,{{N}_{2}}O $ $ 3.\,N{{a}_{2}}O $ $ 4.\,S{{O}_{2}} $ Solution: $ 2.\,{{N}_{2}}O $ Oxides that are neither acidic nor basic are known as neutral oxides. In other...
1. Nylon-6 2. Terylene 3. Bakelite 4. Nylon-6,10 Solution: terylene Ethylene glycol (1,2 ethanediol) and terephthalic acid are the monomers of terylene (1,4 benzene dicarboxylic acid). Terylene...
Cu2+ Fe3+ Na+ Cr3+ Solution: Na+ Cu2+ = 1s22s22p63s23p63d9 Fe3+ = 1s22s22p63s23p63d5 Cr3+ = 1s22s22p63s23p63d3 Na+ = 1s22s22p6 All the given ions except Na+ have unpaired electrons in their...
$ C{{l}_{2}}+2B{{r}^{-}}\,\to \,2C{{l}^{-}}+B{{r}_{2}} $ $ 1.\,C{{l}^{-}} $ $ 2.\,B{{r}^{-}} $ $ 3.\,B{{r}_{2}} $ $ 4.\,C{{l}_{2}} $ Solution: $ 4.\,C{{l}_{2}} $ Br is the reducing agent because it...
1. Sucralose 2. Alitame 3. Aspartame 4. Saccharine Solution: Sucralose Alitame, Aspartame and Saccharine all three contain the CO-NH linkage whereas Sucrolose contains the C-O linkage....
2-methyl-2-nitropropane 2-nitropropane Nitroethane 1-nitropropane Solution: 2-methyl-2-nitropropane The structure of 2-methyl-2-nitropropane is as follows: We can see that...
Solid Sol Emulsion Aerosol Solid foam Solution: Solid Foam Pumice stone is an example of solid foam. In this type of colloid, the dispersion medium is solid and the dispersion phase is...
molecules of urea are present in 100 mL of its solution. The concentration of solution is0.1 M 0.02 M 0.01 M 0.001 M Solution: 0.01 M Given: 6.02×1020 molecules of urea The volume of solution is 100/1000 = 0.1 L 1 mole of urea have 6.02×1023 molecules Number of moles present = 6.02×1020...
$ 1.\,\,{{H}_{3}}P{{O}_{3}}+P{{H}_{3}} $ $ 2.\,\,{{H}_{3}}P{{O}_{4}}+P{{H}_{3}} $ $ 3.\,\,P{{H}_{3}}+{{P}_{2}}{{O}_{5}} $ $ 4.\,\,{{H}_{3}}P{{O}_{3}}+{{P}_{2}}{{O}_{5}} $ Solution: $...
$Chlorobenzene+{{H}_{2}}O\xrightarrow[\Pr essure]{Cu,\,673K}A\xrightarrow[373K]{conc.\,{{H}_{2}}S{{O}_{4}}}B$ 4-hydroxybenzene Sulphonic acid Benzene Sulphonic acid 2-hydroxybenzene Sulphonic acid...
4.5 g 4.8 g 6.07 g 20.7 g Solution: 6.07 g Excess reagents are reactants that are not used up when a chemical reaction is completed. Because its quantity limits the amount of product generated, the...
$ N{{i}_{(s)}}|(1M)\,Ni_{(aq)}^{2+}||(1M)\,Au_{(aq)}^{3+}|Au\left( s \right) $ $ if\,E_{Ni}^{\circ }=-0.25V,\,E_{Au}^{\circ }=1.50V $ -1.25 V 1.75 V 1.25 V -1.75 V Solution: 1.75 V $...
2,4 0,4 2,3 1,3 Solution: 0,4 We can represent 2-iodo-3, 3-dimethyl pentane as follows: ${{H}_{3}}C-CH(I)-C{{(C{{H}_{3}})}_{2}}-C{{H}_{2}}-C{{H}_{3}}$ As we can see that there are zero carbon atoms...
5600 sec 360.0 sec 560.0 sec 3364 sec Solution: 560 sec $ Given: $ $ {{[R]}_{0}}=0.0210\,M~ $ $ [R]=0.0150\,M~ $ $ k=6\times {{10}^{-4}}\,{{\sec }^{-1}} $ $ For\text{ }a\text{ }first\text{...
Phenyl Methanol 2-Methyl Propan-2-ol Propan-2-ol Vinyl Alcohol Solution: Vinyl Alcohol Vinyl Alcohol is represented as follows: The simplest enol is vinyl alcohol, commonly...
Zero Three Two One Solution: One Lactic acid (2-hydroxy propionic acid) is a bifunctional molecule that has both a carboxylic acid and a hydroxyl group, making it useful in a...
$ 1.\,\,{{[Ir{{({{C}_{2}}{{O}_{4}})}_{2}}C{{l}_{2}}]}^{3-}} $ $ 2.\,\,{{[CoC{{l}_{2}}{{(en)}_{2}}]}^{+}} $ $ 3.\,\,{{\left[ Co{{(en)}_{2}}{{(N{{O}_{3}})}_{2}} \right]}^{+}} $ $ 4.\,\,\left[...
+3 +4 +6 +2 Solution: +6 Potassium ferrate has the chemical formula K2FeO4. This purple salt is paramagnetic, and is a rare example of an iron(VI) compound. $...
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1 mole 2 mole 3 mole 4 mole Solution: 1 mole Only one mole of AgCI is precipitated with an excess of AgNO3 because only one Cl- is in the ionization sphere.
$ 1.\,\,CaC{{O}_{3}} $ $ 2.\,\,CaC{{l}_{2}} $ $ 3.\,\,Ca{{(HC{{O}_{3}})}_{2}} $ $ 4.\,\,C{{a}_{2}}HC{{O}_{3}} $ Solution: $ 1.\,\,CaC{{O}_{3}} $ Passing Carbon dioxide through slaked lime gives...
Formation of sigma bonds Mixing and recasting of atomic orbitals Excitation of electrons Loss and gain of electrons Solution: Loss and gain of electrons The following ideas are important in...
It is a saturated aliphatic compound, It is a homocyclic compound. It is a heterocyclic compound with oxygen atom in the ring The molecular formula of Pyran is C5H5S Solution: It is a heterocyclic...
253.5 pm 353.5 pm 465 pm 250 pm Solution: 353.5 pm $ For\text{ }a~FCC~or~~CCP~unit\text{ }cell,we\,have: $ $ 4r=\surd 2\times a $ $ \Rightarrow a=\frac{4r}{\surd 2}=353.5pm $
Fe (Z = 26) Cr (Z = 24) Cu (Z = 29) Mn (Z = 25) Solution: Cr (Z = 24) The following is the electrical configuration of the given elements: $...
Na Mg Li Ca Solution: Li Lithium has the highest ionization potential of all alkali metals, implying that its tendency to ionize to give Li+ ions should be the least, implying that Li should be the...
Conductance Conductivity Resistance Resistivity Solution: Conductivity The ability of an electrolyte solution to conduct electricity is measured by its conductivity (or specific conductance)....
3-Bromoaniline 2-Bromoaniline 4-Bromoaniline 2,4,6-Tribromoaniline Solution: 2,4,6-Tribromoaniline This happens due to the highly activating nature of -...
It is a sugar molecule It is optically active It contains two asymmetric carbon atoms It has carbonyl and hydroxyl group Solution: It contains two asymmetric carbon atoms ...
108.6 pm 127.65 pm 181.6 pm 157.6 pm Solution: 127.65 pm For F.C.C, a√2 = 4r 361×√2 = 4r r = 127.65 pm
$ 1.\,\,{{C}_{5}}{{H}_{5}}N{{H}^{+}}Cr{{O}_{3}}Cl $ $ 2.\,\,{{K}_{2}}C{{r}_{2}}{{O}_{7}}/dil.\,{{H}_{2}}S{{O}_{4}} $ $ 3.\,\,dil.\,HN{{O}_{3}} $ $ 4.\,\,Cr{{O}_{3}} $ Solution: $...
$ 1.\,\,{{C}_{2}}{{H}_{4}}Br $ $ 2.\,\,{{C}_{2}}{{H}_{3}}Br $ $ 3.\,\,{{C}_{3}}{{H}_{5}}Br $ $ 4.\,\,{{C}_{3}}{{H}_{6}}Br $ Solution: $ 3.\,\,{{C}_{3}}{{H}_{5}}Br $ $ The\text{ }Allyl\text{...
154 pm 120 pm 133pm 112pm Solution: 112 pm
M Glucose M Sucrose M Urea M KCl Solution: M KCl ΔTf = i Kf m ΔTf is the freezing point depression, i is the van’t Hoff factor, Kf is the molal freezing point depression constant for the solvent,...
Terylene PHBV Nylon - 6,6 Dextron Solution: Nylon-6,6 Polyamides have the amide linkage. Example- Nylon 6-6, Nylon 6 Nylon 6, 6 is used in the manufacturing of sheets, brush bristles, and...
800 mm of Hg 1600 mm of Hg 200 mm of Hg 600 mm of Hg Solution: 800 mm of Hg This is an example of Boyle's law, which states that the volume of a gas is inversely proportional to the pressure at...
O-hydroxy benzoic acid Acetyl Salicylic acid Ethyl Salicylate Butylated hydroxy Anisole Solution; Butylated hydroxy Anisole Butylated hydroxyanisole (BHA) is an antioxidant made up of...
for HCl is 90 KJ/mol. Then HCl bond energy is360 KJ/mol 213 KJ/mol 180 KJ/mol 425 KJ/mol Solution: 425 KJ/mol $ \frac{1}{2}{{H}_{2}}(g)+\frac{1}{2}C{{l}_{2}}(g)\,\,\to \,\,HCl $ $ \Delta {{H}_{f}}=-90KJ $ $ \Delta {{H}_{f}}=~B.E\text{...
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is 3.333. What is it’s percentage dissociation?80% 70% 33.33% 77.7% Solution: 77.7% $ {{K}_{3}}[Fe{{(CN)}_{6}}]\to 3{{K}^{+}}+{{[Fe{{(CN)}_{6}}]}^{3-}} $ $ We\,get: $ $ i=\alpha n+(1-\alpha )=1+\alpha (n-1)=1+\alpha (4-1)~ $ $ Van't\text{...
473 K 1193 K 423 K 692 K Solution: 692 K The metal Zinc has a melting point of 692K.
$ 1.\,\,Ba{{O}_{2}}+{{H}_{2}}S{{O}_{4}} $ $ 2.\,\,N{{a}_{2}}{{O}_{2}}+{{H}_{2}}S{{O}_{4}} $ $ 3.\,\,Ba{{O}_{2}}+{{H}_{3}}P{{O}_{4}} $ $ 4.\,\,Ba{{O}_{2}}+{{H}_{2}}O+C{{O}_{2}} $ Solution: $...
0.1 NA / 2 2(0.1) NA 0.1 NA 2 NA Solution: 0.1 NA / 2 Given: Mass of element = 40 g and Z = 2 (bcc structure) The number of moles in 1 gram of element = 1/40 Similarly, number of moles in 4 gram of...
There should be very little difference in energy of involving orbitals The shape of hybrid orbitals is the same as that of atomic orbitals The number of hybrid orbitals formed is equal to the...
Nitrogen Sulphur Oxygen Carbon Solution: Nitrogen In analytical chemistry, the Dumas method is a method for quantifying nitrogen in chemical substances based on a method proposed by Jean-Baptiste...
is treated with excess 
in presence of pyridine?$ 1.\,\,{{C}_{2}}{{H}_{5}}N{{(COC{{H}_{3}})}_{2}} $ $ 2.\,\,{{\left( {{C}_{2}}{{H}_{5}} \right)}_{2}}NH $ $ 3.\,\,{{C}_{2}}{{H}_{5}}COOH $ $ 4.\,\,{{C}_{2}}{{H}_{5}}NHCOC{{H}_{3}} $ Solution: $...
Dacron Unrealformaldehyde Polymer Nylon-6 Polythene Solution: Polythene The addition polymers are formed by the repeated addition of monomer molecules possessing double or triple bonds, e.g., the...
Butanal Butanoic Acid Propanoic acid and carbon di-oxide Butan-2-one Solution: Butan-2-one Ketone is the first oxidation product of secondary alcohol. For example, butan-2-ol is oxidised to...
under high pressure?Toulene Benzoic Acid Benzaldehyde Acetophenone Solution: Benzaldehyde When the vapors of CO and HCI are passed into benzene in the presence of anhydrous AICI3/CuCI, benzaldehyde...
$ A)\,{{N}_{2}}{{O}_{4}} $ $ B)\,N{{O}_{2}} $ $ C)\,{{N}_{2}}{{O}_{5}} $ $ D)\,{{N}_{2}}{{O}_{3}} $ Solution: $ B)\,N{{O}_{2}} $ Among the oxides of nitrogen, only NO2 contains odd number of...
. if [A] = 0.3 M what is the arye$ A)\,\,2.1\times {{10}^{-5}}\,{{s}^{-1}} $ $ A)\,\,1.2\times {{10}^{-5}}\,{{s}^{-1}} $ $ A)\,\,1.3\times {{10}^{-5}}\,{{s}^{-1}} $ $ A)\,\,1.6\times {{10}^{-5}}\,{{s}^{-1}} $ Solution: $...
$ 1.\,\,\Delta H-\Delta n=\Delta URT $ $ 2.\,\,\Delta H-\Delta U=\Delta nRT $ $ 3.\,\,\Delta H=\Delta nRT $ $ 4.\,\,\Delta H=\Delta U-RT $ Solution: $ 2.\,\,\Delta H-\Delta U=\Delta nRT $...
A. Gallium B. Bismuth C. Copper D. Zinc Solution: gallium The zone refining method is generally used to refine metalloids and ultra-pure metal is obtained. This is based on the idea that impurities...
A. Iproniazid B. Serotonin C. Veronal D. Prontosil Solution: Prontosil A tranquillizer is a medicine that is used to treat anxiety, fear, tension, agitation, and other mental problems, with the goal...
A. Fe B. Be C. Cu D. Hg Solution: Fe Chemical reaction: $Fe+{{H}_{2}}S{{O}_{4}}\to FeS{{O}_{4}}+{{H}_{2}}$ Iron produces iron sulphate and hydrogen gas when it reacts with dilute sulphuric acid....