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.
Check MCQs with Answers for Class 11 Chemistry Chapter - Hydrocarbons below:
1.Hydrocarbon which is liquid at room temperature is-
Answer: d) pentane
2.Ozonolysis of acetylene gives-
a) None of these
Answer: b) CHO-CHO
3.Which of the following can give both ethane and methane in a one-step reaction?
Answer: a) CH3OH
4.Phenol on heating with NaNO2 and a few drops of conc. H2SO4 gives
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
Answer: c) Neopentane
7.An olefin on reductive ozonolysis gives only ethanal as the major product. Name the olefin.
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
Answer: b) Anhydrous Aluminium Chloride
10.Isomerization of n-hexane on heating with anhydrous AICI3 and HCl gas gives
d) mixture of 2-methylpentane and 3-methylpentane
Answer: d) mixture of 2-methylpentane and 3-methylpentane
Download MCQs on CBSE Class 11 Hydrocarbons in PDF (Link to be updated)