solution: Alternative (iv) is the appropriate response. Condition of a framework can be portrayed by state capacities or state factors which are pressure, volume, temperature and measure of...
There is a lot of dirt and contaminants mixed with water, and most of all the impurities do not dissolve in the water. Soap molecules are a mixture of salts such as sodium or potassium. Molecules...
The Bromine Water Testing is used to distinguish between unsaturated chemicals such as alkenes and alkynes and saturated chemicals. For this purpose, bromine is used in the form of water. The...
The hydrocarbons that undergo addition reactions are: C3H6 C2H2
Hydrogenation is the process or chemical reaction between hydrogen and other chemicals. It is usually done in the presence of catalysts like for example nickel, palladium or platinum. Hydrogenation...
When soap is dissolved in water, due to the formation of alkaline NaOH or KOH, the solution is also alkaline. The solution turns red litmus into blue, but in soap solution, blue litmus do not change...
A scrum is produced by a reaction of hard water with soap. The calcium and magnesium present in hard water form an insoluble white precipitate (scrum).
Carbon and its compounds used as fuel for many applications because they have high calorie values and provide a lot of energy. Most carbon dioxide emits a lot of heat and light when burned in the...
Micelle formation occurs due to contaminated particles in water and fresh water. There are two departments involved: one is pure water and the other is impurities. Soap also has two modes (organic...
Ethanol Ethanoic acid Ethanol do not react with sodium hydrogen carbonate Ethanoic acid reacts with sodium hydrogen carbonate Ethanol has a good smell and a burning taste Ethanoic acid has a vinegar...
A homologous series is a series of chemical compounds having same functional group, general formula and chemical properties. As there is a change in physical structures, we can say that there will...
(a) Electron dot structure of ethanoic acid: (b) Electron dot structure of H2S: (c) Electron dot structure of propanone: (d) Electron dot structure of F2:
Carbon cannot lose four electrons or gain four electrons as these processes make the system unstable due to the need for additional energy. CH3Cl therefore eliminates its octet suspension by sharing...
Correct Answer: (b) the fuel is not burning completely Explanation: While cooking, if the bottom of the vessel is dark outside it shows that the fuel is not completely burning.
Correct Answer: (c) ketone Explanation: Butanone, also known as methyl ethyl ketone, is an organic chemical compound manufactured on a large scale, but only happens in the environment by tracing.
Correct Answer: (b) 7 covalent bonds Explanation: Ethane is the simplest hydrocarbon containing a single carbon-carbon bond. The second most important source of natural gas, it is also dispersed in...
Usually, agitation is necessary to obtain clean clothes such as agitation aid soap micelles to hold oil, grease or any other impurities to be removed. When the clothes are agitated or beaten, the...
It is impossible to check whether the water is hard by using a detergent because the detergents are made of ammonium salts or long carboxylic acid sulphonates. Unlike soaps do not work with calcium...
Oxidising agents are compounds that remove Hydrogen or add oxygen to a mixture. Eg: halogen, potassium nitrate, and nitric acid.
In reaction with Sodium Carbonate, Carboxylic acid produces carbon dioxide gas which converts lime water into a milky form and alcohol does not give this reaction. This test can be used to separate...
The mixture of oxygen and ethyne is heated instead of a mixture of ethyne and air because heat production is very important in heating metals. When oxygen and ethyne burn, they completely burn to...
The conversion of ethanol to ethanoic acid involves the removal of the Hydrogen atom and the addition of oxygen (oxidation reaction). In the first step, the Hydrogen molecule is removed from ethanol...
1. CH3—CH2—Br 2. 3. Answers: 1. Bromoethane 2. Methanal or Formaldehyde 3. 1 – Hexyne
(i) Ethanoic acid: (ii) Bromopentane: (iii) Butanone: (iv) Hexanal:
Formula and Electron dot structure of cyclopentane:
Carbon has six electrons in valence which is actually the highest number of valency. The Covalent bond occurs easily with carbon atoms and many others such as oxygen, chlorine, nitrogen, sulfur,...
1. n-pentane: 2. 2-methylbutane: 3. 2, 2-dimethylpropane:
Electron dot structure of a molecule of Sulphur:
Electron dot structure of carbon dioxide (CO2):
(a) Fifty (b) Sixty (c) Seventy (d) Ninety Solution: Option (b) is the answer. Buckminsterfullerene has the formula C60 and is a kind of fullerene. It is made up of twenty hexagons and twelve...
(a) 2 (b) 5 (c) 3 (d) 4 Solution: Option (c) is the answer.
(a) Lithium (b) Charcoal (c) Lead (d) Graphite Solution: Option (d) is the answer.
(a) C4H10 (b) C5H12 (c) C3H8 (d) C6H14 Solution: Option (c) is the answer. Because there must be greater than or equal to 4 carbon atoms for chain isomerism to occur, propane does not display chain...
(a) Cyclobutane (b) Benzene (c) Butene (d) Hexene Solution: Option (b) is the answer. Benzene is a hydrocarbon that has alternate single and double bonds arranged in the form of a ring. Alternating...
(a) 200 (b) 198 (c) 202 (d) 196 Solution: Option (a) is the answer. Alkenes are made up of double bonds and have the formula CnH2n. The number of carbon atoms in its molecule is denoted by the...
(a) Twenty-five (b) Twenty four (c) Twenty-six (d) Twenty seven Solution: Option (b) is the answer. Saturated hydrocarbons with the general formula CnH2n+2 are known as alkanes. The number of...
(a) Sodium and silicon (b) Chlorine and carbon (c) Carbon and sodium (d) Silicon and carbon Solution: Option (d) is the answer. Silicon and Carbon both can bond with 4 other atoms to form long-chain...
(a) Two (b) Five (c) Three (d) Four Solution: Option (b) is the answer. Neopentane, commonly known as 2,2-dimethylpropane, is a five-carbon double-branched-chain alkane. At room temperature and...
(a) Diamond (b) Graphite (c) Cumene (d) Buckminsterfullerene Solution: Option (c) is the answer. Cumene (isopropylbenzene) is an aliphatic-substituted aromatic hydrocarbon. Crude oil and refined...
(a) Glucose (b) Urea (c) Uric acid (d) Vinegar Solution: Option (b) is the answer.
(a) Steel girders (b) Logs of woods (c) Marble slabs (d) Asbestos sheets Solution: Option (c) is the answer. Diamond is hard. Hence suitable for cutting marble slabs.
(a) 150 (b) 148 (c) 152 (d) 146 Solution: Option (b) is the answer. The number of hydrogen atoms in an alkyne molecule with 75 carbon atoms is 148. Alkynes have the generic formula CnH2n-2, where n...
(a) 24 (b) 25 (c) 26 (d) 28 Solution: Option (c) is the answer. CnH2n-2 is the general formula for unsaturated hydrocarbons containing a triple bond. The number of atoms in one molecule is denoted...
(a) n-pentane (b) n-butane (c) Propane (d) Iso-butane Solution: Option (a) is the answer.
(a) C6H12 (b) C6H14 (c) C6H6 (d) C6H10 Solution: Option (c) is the answer.
(a) Protonation (b) Carbonation (c) Coronation (d) Catenation Solution: Option (d) is the answer. Catenation is the bonding of atoms of the same element into a series, known as a chain, in...
(a) 5 (b) 12 (c) 17 (d) 16 Solution: Option (d) is the answer. In pentane, each bond pair is a covalent bond.There are 16 single bonds in all.As a result, the correct answer is 16.
(a) C2H6 and C4H6 (b) C6H12 and C5H12 (c) C4H6 and C6H12 (d) C2H5 and C4H10 Solution: Option (c) is the answer. Unsaturated hydrocarbons are those that belong to the alkene or...
(a) Phosphorus (b) Fluorine (c) Carbon (d) Sulphur Solution: Option (c) is the answer. Buckminsterfullerene has the formula C60 and is a kind of fullerene. It is made up of twenty hexagons and...
(i) C3H8 (ii) C4H10 (iii) C5H12 (iv) C6H14 Solution: (e) (i) No isomers (ii) Two (iii) Three (iv) Five
(d) Give one example of a hydrocarbon, other than pentane, having more than three isomers. Solution: (c) Saturated cyclic hydrocarbon: Cyclohexane C6H12 Unsaturated Cyclic hydrocarbon: Benzene C6H6...
(b) Explain the meaning of saturated and unsaturated hydrocarbons with two examples each. Solution: (a) A hydrocarbon is a compound composed entirely of hydrogen and carbon. Methane (CH4), ethane...
(d) Write the IUPAC names for the following: Solution: (c) Butane (d) (i) 2-methylpropane (ii) 2-methylbutane (iii) Propene (iv) Propyne
(b) Write (i) structural formula, and (ii) electron-dot structure, of anyone isomer of n-heptane. Solution: (a) Isomers are organic molecules that have the same chemical formula but distinct...
(d) State any two uses of graphite. Solution: (c) Each carbon atom in a graphite crystal is linked to just three other carbon atoms. As a result, the fourth valence electron is free and is...
(b) Describe the structure of graphite with the help of a labelled diagram. Solution: Solution: (a) Graphite is a carbon allotrope that is a soft, greyish black, and opaque carbon-based material....
(d) State any two uses of a diamond. Solution: (c) It has a high melting point, and breaking the network of strong covalent connections requires a lot of energy. (d) (i) Used in the creation of...
(b) Describe the structure of the diamond. Draw a simple diagram to show the arrangement of carbon atoms in a diamond. Solution: Solution: (a) A diamond is a clear, colourless material with...
(d) State one use of diamond which depends on its ‘extraordinary brilliance’ and one use of graphite that depends on its being ‘black and quite soft’. Solution: (c) Due to its hardness, diamond may...
(b) Explain why graphite can be used as a lubricant but diamond cannot. Solution: (a) (i) Carbon atoms in diamonds are bonded to four other carbon atoms. The carbon atom in graphite is connected to...
(i) ethyne (ii) ethene (iii) benzene (b) Write the molecular formula and structure of cyclohexane. How many covalent bonds are there in the molecule of cyclohexane? Solution: (i)(ii) (iii) (i)...
(b) Explain why, diamond is hard while graphite is soft. Solution: (a) By joining atoms to atoms, carbon may create lengthy chains. The most distinctive feature of a carbon atom is catenation. As a...
(c) Write the molecular formula and structure of benzene. Solution: (b) (i) Acetylene (ii) Ethylene (c) C6H6
(i) alkane ; (ii) alkene ; (iii) alkyne ; (iv) cycloalkane. Solution: (i)
(b) Write down the structures and names of two isomers of butane (C4H10). Solution: (a) Carbon can build long chains of carbon atoms through covalent bonding, which is why there are so many...
(b) Give any two differences between the properties of diamond and graphite. What causes these differences? Solution: Diamonds may be created artificially by exposing pure carbon to extremely high...
Solutions: An element's capacity to make bonds with other atoms of the same element is referred to as catenation. Both carbon and silicon show this property. In comparison to silicon, carbon has a...
(b) Which of the following is the molecular formula of benzene? C6H6 , C6H10 , C6H12 , C6H14 (c) Which of the two has a branched-chain: isobutene or normal butane? Solution: (a) Methane (single...
(i) Give the name and formula of the inorganic compound. (ii) Write the name and formula of the organic compound formed. (b) Give the molecular formula of butane and mention the names of its two...
Solution: (a) Buckminsterfullerene is a carbon allotrope with 60 carbon atom clusters linked together to create spherical molecules. Nothing is left behind when it burns to generate carbon dioxide...
Solution: (a) (i) CnH2n+2 (ii) CnH2n (iii) CnH2n-2 (b) Alkanes: C5H12 , C5H8 Alkenes: C2H4 , C4H8 Alkynes: C3H4 ,C5H8
Solution: (a) Catenation is the property of carbon atoms self-combining to create a lengthy chain. Catenation is a characteristic that exists between carbon and silicon. (b) Hexane has five isomers:...
Solution: (a) Hydrocarbons are the broad term for all carbon and hydrogen-based molecules. (b) In order to reach the inert gas state by sharing electrons, carbon builds compounds primarily through...
Solution: (a) Carbon has an atomic number of 6. It has a 2,4 electronic configuration. (b) Carbon can only acquire the inert gas electron configuration by sharing electrons, therefore it forms...
Solution: (k) Ethene (l) Ethyne Ethene and ethyne are chemical molecules that belong to the hydrocarbon family. Ethene is an alkene with two carbon atoms and four hydrogen atoms in its structure....
Solution: (i) Catenation (j) Alkenes
Solution: (g) Two (h) Low; covalent
Solution: (e) Alkynes. An alkyne is an unsaturated hydrocarbon with at least one triple bond between carbon and carbon. With only one triple bond and no other functional groups, the simplest acyclic...
Solution: (c) Hydrocarbons. A hydrocarbon is an organic molecule made completely of hydrogen and carbon in organic chemistry. Hydrocarbons are an example of hydrides in group 14. Hydrocarbons are...
Solution: (a) Graphite (b) Graphite Graphite, sometimes known as plumbago, is a crystalline form of the element carbon with atoms organised in a hexagonal pattern. It is the most stable form of...
Solution: (i) Isomer of hexane: 2-methyl pentane.
Solution: Isomers are substances that have the same chemical formula but differ in other ways. Structural isomers are molecules that contain the same number and type of atoms but are bound to one...
Solution: Isopentane and neopentane are the two isomers of C5H12.
Solution: Butane, sometimes known as n-butane, is a kind of alkane with the formula C4H10. At room temperature and atmospheric pressure, butane is a gas. Butane is a combustible, colourless, and...
Solution: Propyne is a kind of alkyne having the formula CH3CCH. It's one of the ingredients in MAPD gas, along with its isomer propadiene, which was once widely utilised in gas welding. Propyne,...
Solution:
Solution: Ethane.
Solution:
Solution: Methyl group: A methyl group is a methane-derived alkyl with one carbon atom linked to three hydrogen atoms — CH3. The group is frequently abbreviated Me in formulae. Many organic...
Solution: Diamond. Each carbon atom has four electrons in its outermost shell. These electrons are shared with four other carbon atoms in diamond to form extraordinarily strong chemical bonds,...
Solution: C60 is a molecule that consists of 60 carbon atoms, arranged as 12 pentagons and 20 hexagons. The name was chosen because the geodesic domes of Buckminster Fuller provided a clue that the...
Solution: Each carbon atom in graphite forms hexagonal rings with three other carbon atoms, which are held together by weak Vander Waal interactions to form layers. These layers can slide over one...
Solution: Graphite is the black substance found within a pencil. Because graphite is a good conductor of electricity, the current will flow through the electrical circuit when we utilise the...
Solution: (a) One buckminsterfullerene molecule contains 20 hexagonal carbon rings. (b) One buckminsterfullerene molecule contains 12 pentagonal carbon rings.
Solution: Apart from propane and butane 2 isomers found in LPG are- (i) n−butane: CH3-CH2-CH2-CH3 (ii) iso-butane: CH3-CH3-CH-CH3
Solution: Carbon is the element whose allotropic form is graphite. Graphite is a crystalline form of carbon that is soft. Diamonds and fullerenes are two other types ("buckyballs"). It's opaque,...
Solution: Friedrich Wohler is the scientist who debunked the 'vital force theory' for the production of organic molecules. Wöhler is well recognised for his contributions to organic chemistry,...
Solution: True. Carbon's massive molecular structure is made up of covalently bound carbon lattices. Because these connections are extremely strong, they are rigid and have high melting points. A...
Solution: The following are two characteristics of carbon that give rise to a huge number of compounds: (i) Catenation refers to a carbon atom's ability to make bonds with other carbon atoms. (ii)...
Solution: Carbon is an element with buckminsterfullerene as one of its allotropic forms. Diamond and graphite are the other allotropic forms of carbon.
Compound A – Ethanol (CH3CH2OH) Reaction Involved: CH3CH2OH → CH2-CH2+ H2O Compound B – Ethene (CH2= CH2) Reaction Involved: CH2=CH2 →C2H6 Compound C - Ethane (CH3 — CH3) Reaction...
(a) Hydrogenation reaction (b) Oxidation reaction (c) Substitution reaction (d) Saponification reaction (e) Combustion reaction Answers: (a) Hydrogenation reaction - The addition reaction...
(a) ethanol to ethene. b) propanol to propanoic acid. Write the reactions. Answers: (a)Process of conversion: Ethanol is heated in the presence of conc. sulphuric acid at 443 K. Reaction Involved:...
(a) What change would you observe in the calcium hydroxide solution taken in tube B? (b) Write the reaction involved in test tubes A and B respectively. (c) If ethanol is given instead of ethanoic...
Identification: C - Ethanoic acid R - Sodium Ethanoate A - Ethanol S - Ester Reactions Involved: 2CH3COOH +2 Na →2CH3COONa+H2 CH3COOH +C2H5OH → CH3COOC2H5 + H20 CH3COOC2H5+NaoH...
Activity Involved: Take 1ml ethanol and 1 ml glacial acetic acid in a test- tube. Add few drops of concentrated H2SO4. Heat the test tube for 5 minutes with the help of a boiling water bath....
(b) What is saponification? Write the reaction involved in this process. Answers: (a) Formula of carbon tetrachloride - CCl4 (b) Saponification is the reaction of an ester to produce sodium salt of...
Hydrogenation is the reaction which is commonly used in the conversion of vegetable oils to fats. In this process, Nickel acts as a catalyst. Reaction Involved:
Answers: (a) The Hydrocarbons are basically the compounds of Carbon and hydrogen such as Ethane and Methane. (b) The Hydrocarbons having single bond is known as saturated hydrocarbons such as Ethane...
Identification: Salt X - Sodium Ethanoate Gas - Carbon-di-oxide. Reaction Involved: CH3COOH+NaHCO3 → CH3COONA+H2O+CO2 Activity Involved: Experiment set up. 2. In a test-tube and take spoon full of...
Column AColumn B(a) CH3OH + CH3COOH CH3COOCH3 + H2O(i) Addition reaction(b) CH2 = CH2 + H2 CH3 — CH3(ii) Substitution reaction(c) CH4 + Cl2 Sunlight CH3Cl + HCl(iii) Neutralisation reaction(d)...
The saturated hydrocarbons burn with a pure flame and do not produce soot while non-saturated hydrocarbons burn yellow flames and produce more soot. Ethane is saturated with hydrocarbon and heats...
Catenation is shown by Silicon and Carbon. Silicon bonds are not very stable and reactive but the bonds made of Carbon bonds are so strong which is why the catenation of carbon is greater than the...
(a) The atomic number of chlorine is 17. Write its electronic configuration (b) Draw the electron dot structure of chlorine molecule Answers: (a) Electronic configuration of chlorine: KLM- 2,8,7...
(a) Chlorine (Group 17 of Periodic Table) (b) Oxygen (Group 16 of Periodic Table) Answers: (a) Compound formed with chlorine is Carbon Tetrachloride (CCl4–) (b) Compound formed with oxygen is...
Ethene is formed when ethanol at 443 K is heated with excess of concentrated sulphuric acid. Sulphuric acid helps in the formation of ethane as it is a dehydrating agent and also is a catalyst....
Hydrogen gas is evolved when ethanol reacts with sodium. Reaction Involved: 2CH₃- CH₂-OH +2Na——>2 CH₃- CH₂- ONa + H₂
Methanol is converted into Methanal in the liver and kills all cells. Methanol also affects optic nerves and causes blindness. So, eating even small amount of methanol can be dangerous.
Ethene is prepared by the heating of Ethanol at 443k in the presence of excess sulphuric acid. Reaction Involved: CH3-CH2OH —> CH2=CH2 +H2O
(a) CH3COCH2 CH2 CH2 CH3 (b) CH3CH2CH2COOH (c) CH3CH2 CH2 CH2 CHO (d) CH3CH2OH Identification: 1. Ketone 2. Carboxylic acid 3. Aldehyde 4....
Detergents are better than soaps because detergents are ammonium or sulphonate salts of long-chain carboxylic acid. And, Soap forms precipitate with calcium and magnesium ions present in hard water.
(a) Ethanoic acid (CH3COOH) (b) Ethanol (CH3CH2OH) (c) Ethyl ethanoate (CH3COOCH2CH3 ) Reactions Involved: (a) (b) (c)
Identification: (a) Alcohol (b) Carboxylic acid (c) Ketone (d) Alkene
Identification: (a) Pentanoic acid (b) Butyne (c) Heptanal (d) Pentanol
Electron dot structure of ethyne: Structural formula of ethyne: H-C≡C-H
(a) ethyne (b) ethene (c) propyne (d) methane Answer: (b) ethyne Reason: In the alkyne series, there is a triple bond between carbon atoms. The first component of the alkyne series is ethyne with...
(a) CH3COONa + NaOH → CH4 + Na2CO3 (b) CH3COOH + C2H5OH → CH3COOC2H5 +H2O (c) 2CH3COOH + 2Na → 2CH3COONa + H2 (d) CH3COOC2H5 + NaOH → CH3 COONa + C2H5OH Answer: (d) CH3COOC2H5 + NaOH → CH3...
(i) oxygen (ii) carbon (iii) hydrogen (iv) chlorine (a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (d) (i) and (iv) Answer: (d) (i) and (iv) Reason: The heteroatoms present in CH3 — CH2 — O...
(a) Propanal (b) Propanone (c) Ethanol (d) Ethanal Answer: (a) Propanal Reason: The name of the compound CH3 — CH2 — CHO is Propanal.
(a) CH4 (b) C2 H6 (c) C3 H8 (d) C4 H8 Answer: (d) C4 H8 Reason: Ethane and propane are in the same series while C4 H8 is not alkene.
(a) (i) and (iii) (b) (ii) and (iii) (c) (ii) and (iv) (d) (iii) and (iv) Answer: (c) (ii) and (iv) Reason: Unsaturated hydrocarbon is a chemical compound that contains a carbon-carbon bond or...
Answer: (d) Reason: Option A, B, C is direct hydrocarbons, since each carbon atom is linked to one or two carbon atoms.
Answer: (c) Reason: The oxygen atom has six electrons in valence, of which 2 are involved in contact with 2 hydrogen atoms. A water molecule therefore has two lone electrons joined by two bonded...
(a) helium (b) neon (c) argon (d) krypton Answer: (b) neon Reason: Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g. hydrogen. After the...
(i) mineral acids are completely ionised (ii) carboxylic acids are completely ionised (iii) mineral acids are partially ionised (iv) carboxylic acids are partially ionised (a) (i) and (iv) (b) (ii)...
(a) 50% – 60% acetic acid in alcohol (b) 5% – 8% acetic acid in alcohol (c) 5% – 8% acetic acid in water (d) 50% – 60% acetic acid in water Answer: (c) 5% – 8% acetic acid in water Reason:...
Answer: (d) Reason: Butanoic acid is a carboxylic acid and the structural formula of butanoic acid is shown in the option (d).
(a) sodium ethanoate and hydrogen (b) sodium ethanoate and oxygen (c) sodium ethoxide and hydrogen (d) sodium ethoxide and oxygen Answer: (c) sodium ethoxide and hydrogen Reason: Reaction between...
Answer: (c) Reason: Benzene is a compound which is cyclic in structure having double bonds alternatively and the correct structural formula is as shown in the option (c).
(a) 5 covalent bonds (b) 12 covalent bonds (c) 16 covalent bonds (d) 17 covalent bonds Answer: (c) 16 covalent bonds Reason: Pentane has 16 covalent bonds.
(a) the ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster. (b) ionic end of soap is in the interior of the cluster and the carbon chain is...
(a) absence of sunlight (b) presence of sunlight (c) presence of water (d) presence of hydrochloric acid Answer: (b) presence of sunlight Reason: Because of the halogenation process, chlorine reacts...
(i) Propane (ii) Propene (iii) Propyne (iv) Chloropropane (a) (i) and (ii) (b) (ii) and (iv) (c) (iii) and (iv) (d) (ii) and (iii) Answer: (d) (ii) and (iii) Reason: Propene and Propyne are the...
Answer: (a) Reason: Ethyne can also be known as Acetylene and is a two carbon alkyne and the correct structural formula is shown in option (a).
Answer: (d) Reason: The correct representation of the electron dot structure of the nitrogen is shown in the option (d).
(a) hydrophilic head and a hydrophobic tail (b) hydrophobic head and a hydrophilic tail (c) hydrophobic head and a hydrophobic tail (d) hydrophilic head and a hydrophilic tail Answer: (a)...
(a) Butanone (b) Butanol (c) Butanoic acid (d) Butanol Answer: (b) Butanol Reason: In Butanol, –OH is the functional group.
(a) Addition reaction (b) Substitution reaction (c) Displacement reaction (d) Oxidation reaction Answer: (a) Addition reaction Reason: Oils when treated with hydrogen in the presence of palladium or...
In the above-given reaction, alkaline KMnO4 acts as (a) reducing agent (b) oxidising agent (c) catalyst (d) dehydrating agent Answer: (b) oxidising agent Explanation: Oxidation of ethanol to form...
(a) (i) and (iii) (b) (ii) and (iv) (c) (i) and (ii) (d) (iii) and (iv) Answer: (c) (i) and (ii) Explanation: n−butane and iso−butane are the correct structural isomers of...
(a) phosphorus (b) sulphur (c) carbon (d) tin Answer: (c) carbon Reason: Buckminsterfullerene is an allotropic carbon form. It has carbon atoms arranged in a ball-like pattern. It is soft, slippery,...
(a) only single bonds (b) only double bonds (c) only triple bonds (d) two double bonds and one single bond Answer: (a) only single bonds Explanation: An ammonia molecule has only a single...
(i) are good conductors of electricity (ii) are poor conductors of electricity (iii) have strong forces of attraction between their molecules (iv) do not have strong forces of attraction between...
(a) carbon monoxide only (b) carbon monoxide in traces and carbon dioxide (c) carbon dioxide only (d) coal Answer: (c) carbon dioxide only Reason: Carbon is a compound which is found in the...
solution: Two realm orders didn't recognize the prokaryotes and eukaryotes They didn't recognize unicellular and multicellular life forms They additionally didn't recognize...
solution: The gathering of life forms at any level is known as Taxon. This can be positioned as Species-sort family-request class-phylum/division-realm As we go from species to realm there is a...
solution: These variations are known as the 'ecotypes'. Plants show changes in morphological components because of the altitudinal angle.
Solution: George Bentham and Joseph Dalton Hooker are known botanists who gave the regular arrangement of order of blooming plants.