CBSE Class 11 Chemistry Hydrocarbons MCQs

Refer to CBSE Class 11 Chemistry Hydrocarbons MCQs provided below. CBSE Class 11 Chemistry MCQs with answers available in Pdf for free download. The MCQ Questions for Class 11 Chemistry with answers have been prepared as per the latest syllabus, CBSE books and examination pattern suggested in Class 11 by CBSE, NCERT and KVS. Multiple Choice Questions for Chapter 13 Hydrocarbons are an important part of exams for Class 11 Chemistry and if practiced properly can help you to get higher marks. Refer to more Chapter-wise MCQs for CBSE Class 11 Chemistry and also download more latest study material for all subjects

MCQ for Class 11 Chemistry Chapter 13 Hydrocarbons

Class 11 Chemistry students should refer to the following multiple-choice questions with answers for Chapter 13 Hydrocarbons in Class 11. These MCQ questions with answers for Class 11 Chemistry will come in exams and help you to score good marks

Chapter 13 Hydrocarbons MCQ Questions Class 11 Chemistry with Answers

Question: Which of the following fuel cause the least pollution ?

a) LPG

b) CNG

c) Petrol

d) Kerosene

Answer: LPG

 

Question: LPG mainly contains

a) butane

b) ethane

c) methane

d) ethyne

Answer: butane

 

Question: Which of the following gas is find in coal mines and marshy places?

a) Methane

b) Ethane

c) Propane

d) Benzene

Answer: Methane

 

Question: Two adjacent members of a homologous series have

a) All the above

b) same general method of preparation

c) a different of 14 amu in molecular mass

d) a difference of CH2 in their structure

Answer: All the above

 

Question: Methane, ethane and propane are said to form a homologous series because all are

a) differ from each other by a CH2 group

b) aliphatic compounds

c) saturated compounds

d) hydrocarbons

Answer: differ from each other by a CH2 group

 

Question: The number of primary, secondary and tertiary carbons in 3, 4-dimethylheptane are respectively

a) 4, 3 and 2

b) 4, 2 and 3

c) 2, 3 and 4

d) 3, 4 and 2

Answer: 4, 3 and 2

 

Question: Which of the following statements is false for isopentane

a) It has a carbon which is not bonded to hydrogen

b) It has one CH group

c) It has three CH3 groups

d) It has one CH2 group

Answer: It has a carbon which is not bonded to hydrogen

 

Question: How many isomers are possible for the C5H12 ?

a) 3

b) 5

c) 2

d) 4

Answer: 3

 

Question: The number of 4° carbon atoms in 2,2,4,4-tetramethyl pentane is –

a) 2

b) 4

c) 1

d) 3

Answer: 2

 

Question: Which one of the following cannot be prepared by Wurtz reaction ?

a) CH4

b) C2H6

c) Both

d) None of these

Answer: CH4

 

Question: Pure methane can be produced by

a) Soda-lime decarboxylation

b) Reduction with H2

c) Kolbe’s electrolytic method

d) Wurtz reaction

Answer: Soda-lime decarboxylation

 

Question: Sodium salts of carboxylic acids on heating with soda lime give alkanes containing _______ than the carboxylic acid

a) one carbon less

b) one carbon more

c) two carbon less

d) All of these

Answer: one carbon less

 

Question: Which one of the following has the least boiling point?

a) 2, 2– dimethylpropane

b) 2-methylpropane

c) n-butane

d) n-pentane

Answer: 2, 2– dimethylpropane

 

Question: Which one of the following has highest boiling point?

a) n-Octane

b) Iso-octan

c) 2,2 dimethyl pentane

d) All have equal values

Answer: n-Octane

 

Question: In the free radical chlorination of methane, the chain initiating step involves the formation of

a) chlorine free radical

b) hydrogen chloride

c) methyl radical

d) chloromethyl radical.

Answer: chlorine free radical

 

Question: Which one of the following gives only one monochloro derivative?

a) neo-pentane

b) 2-methylpentane

c) n-hexane

d) 2, 3-dimethylpentane

Answer: neo-pentane

 

Question: Photochemical halogenation of alkane is an example of

a) free radical substitution

b) nucleophilic substitution

c) electrophilic addition

d) electrophilic substitution

Answer: free radical substitution

 

Question: 2-Methylbutane on reacting with bromine in the presence of sunlight gives mainly

a) 2-bromo-2-methylbutane

b) 1-bromo-2-methylbutane

c) 2-bromo-3-methylbutane

d) 1-bromo-3-methylbutane

Answer: 2-bromo-2-methylbutane

 

Question: Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by

a) cracking

b) distillation under reduced pressure

c) hydrolysis

d) oxidation

Answer: cracking

 

Question: n-Hexane isomerises in presence of anhydrous aluminium chloride and hydrogen chloride gas to give

a) Both

b) 2-Methyl pentane

c) 3-Methyl pentane

d) None of these

Answer: Both

 

Question: How many conformations are possible for ethane ?

a) infinite

b) 2

c) 3

d) one

Answer: infinite

 

More Study Material

CBSE Class 11 Chemistry Chapter 13 Hydrocarbons MCQs

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Chapter 13 Hydrocarbons CBSE Class 11 MCQs Chemistry

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CBSE MCQs Chemistry Class 11 Chapter 13 Hydrocarbons

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