Q1. The functional group present in alcohols is:
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Answer: B. -OH
Alcohols contain the hydroxyl (-OH) functional group.
Chemistry - Carbon Compounds Questions for SSC CGL (with Answers)
10 Chemistry - Carbon Compounds MCQs from the General Awareness section, with answers and short explanations.
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Q2. What is the valency of carbon?
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Answer: C. 4
Carbon has 4 valence electrons and shows a valency of 4.
Q3. Heating an ester with sodium hydroxide to make soap is called:
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Answer: A. Saponification
Saponification is the alkaline hydrolysis of esters (fats/oils) that produces soap.
Q4. The reaction of a carboxylic acid with an alcohol in the presence of an acid catalyst gives a sweet-smelling:
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Answer: A. Ester
Acid + alcohol -> ester + water; this is esterification.
Q5. What is the chemical formula of ethanol?
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Answer: B. C2H5OH
Ethanol is C2H5OH (CH3CH2OH).
Q6. The unique ability of carbon atoms to link with each other to form long chains is called:
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Answer: C. Catenation
Catenation is the self-linking property of carbon atoms.
Q7. Which gas is burnt with oxygen to produce a very hot flame for welding?
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Answer: C. Ethyne (acetylene)
Ethyne burnt with oxygen (oxy-acetylene flame) is used for welding.
Q8. How many structural isomers are possible for butane (C4H10)?
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Answer: C. 2
Butane has two isomers: n-butane and isobutane (2-methylpropane).
Q9. Vegetable oils are converted to vanaspati ghee by adding hydrogen in the presence of which catalyst?
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Answer: A. Nickel
Hydrogenation of vegetable oils is carried out using a nickel catalyst.
Q10. The general formula of alkenes is:
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Answer: D. CnH2n
Alkenes follow the general formula CnH2n (e.g. ethene, C2H4).
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