MCQs for Class 11 Chemistry Hydrocarbons with Answers: Download in PDF

Hydrocarbons Class 11 MCQs: Download MCQs by subject experts in PDF to prepare for CBSE Class 11 Chemistry Exam 2023-24. All questions are provided with answers.

MCQs on Class 11 Hydrocarbons: Get MCQs curated by subject experts to strengthen the concept and assess your understanding of the CBSE Class 11 Chemistry Chapter 9, Hydrocarbons. All the questions have been carefully crafted to help you test and enhance your knowledge of hydrocarbons, covering topics like alkanes, alkenes, alkynes, isomerism, and more. These MCQs will serve as a valuable tool in an effective revision of the chapter and in securing high marks in the CBSE Class 11 Chemistry Exam 2023-24. These questions are based on the previous years’ exams and the latest CBSE Class 11 Chemistry Syllabus. So, practise all questions to strengthen the concepts and get exam ready. Read and download all questions and answers in PDF here.

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CBSE Class 11 Chemistry Syllabus 2023-24

CBSE Class 11 Chemistry Deleted Syllabus 2023-24

Check MCQs with Answers for Class 11 Chemistry Chapter – Hydrocarbons below:

1.Hydrocarbon which is liquid at room temperature is-

a) butane

b) propane

c) ethane

d) pentane

Answer: d) pentane

2.Ozonolysis of acetylene gives-

a) None of these

b) CHO-CHO

c) CH₃CHO

d) HCHO

Answer: b) CHO-CHO

3.Which of the following can give both ethane and methane in a one-step reaction?

a) CH₃OH

b) C₂H₅OH

c) CH₃Br

d) C₂H₅Br

Answer: a) CH₃OH

4.Phenol on heating with NaNO₂ and a few drops of conc. H₂SO₄ gives

a) p–Nitrosophenol

b) m – Nitrosophenol

c) o– Nitrophenol

d) p – Nitrophenol

Answer: a) p – Nitrosophenol

5.Arrange the halogens F₂, Cl₂, Br₂, I₂, in order of their increasing reactivity with alkanes.

a) Br₂< Cl₂< F₂ < I₂ 

b) F₂< Cl₂< Br₂ < I₂ 

c) Br₂< I₂< Cl₂ < F₂ 

d) I₂< Br₂ < Cl₂< F₂

Answer: d) I₂ < Br₂ < Cl₂ < F₂

6.Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of monosubstituted alkyl halide?

a) Tertiary butyl chloride

b) Neohexane

c) Neopentane

d) Isohexane

Answer: c) Neopentane

7.An olefin on reductive ozonolysis gives only ethanal as the major product. Name the olefin.

a) But-1-ene

b) Propene

c) Ethene

d) But-2-ene

Answer: d) But-2-ene

8.Photochemical fluorination is explosive while iodination is too slow to occur. The reason for this is:

a) bond dissociation energy of I₂ is minimum.

b) formation of CH₃–F is most exothermic.

c) formation of H–F is most exothermic while formation of HI is endothermic.

d) F₂has lower bond dissociation energy than Cl₂and Br₂

Answer: c) formation of H–F is most exothermic while formation of HI is endothermic.

9.The catalyst used in Friedel–Crafts reaction is

a) Aluminium Chloride

b) Anhydrous Aluminium Chloride

c) Ferric Chloride

d) Copper

Answer: b) Anhydrous Aluminium Chloride

10.Isomerization of n-hexane on heating with anhydrous AICI₃ and HCl gas gives

a) 2-methylpentane

b) 3-methylpentane

c) 2-methylhexane

d) mixture of 2-methylpentane and 3-methylpentane

Answer: d) mixture of 2-methylpentane and 3-methylpentane

Also Read:

NCERT Book for Class 11 Chemistry (Revised)

NCERT Solutions for Class 11 Chemistry