300+ TOP MCQs on Alkene and Answers

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MCQs on Alkene :

1. Which of the following compounds react most readily with Br_(g)?
(A) C₂H₂
(B) C₃H₆
(C) C₂H₄
(D) C₄H₁₀

Answer

Answer: (d)

2. When propene reacts with HBr in the presence of peroxide, it gives rise to
(A) allyl bromide
(B) isopropyl bromide
(C) n-propyl bromide
(D) 3-bromopropane

Answer

Answer: (d)

3. Find the alkene with maximum stability
(A) cis-2-Butene
(B) trans-2-Butene
(C) 1-Butene
(D) All have the same stability

Answer

Answer: (d)

4. Ethylene bromide on treatment with Zn gives
(A) Alkyne
(B) Alkene
(C) Alkane
(D) All of the above

Answer

Answer: (d)

5. Which of the following reactions is common in alkenes?
(A) Addition
(B) Elimination
(C) Substitution
(D) Superposition

Answer

Answer: (d)

6. Cis-trans isomerism in alkenes is due to
(A) chiral carbon
(B) free rotation about single bond
(C) free rotation about double bond
(D) restricted rotation about double bond

Answer

Answer: (d)

7. Baeyer’s reagent is used to detect
(A) glucose
(B) double bonds
(C) oxidation
(D) reduction

Answer

Answer: (d)

8. Which of the following will form 2 acetaldehyde molecules on ozonolysis?
(A) 1-pentene
(B) 2-pentene
(C) 1-butene
(D) 2-butene

Answer

Answer: (d)

9. Which of the following reagents will form 1-propanol from propene?
(A) B₂H₆, H₂O₂, OH^–
(B) Aq. KOH
(C) H₂O, H₂SO₄
(D) Hg(OAc)₂, NaBH₄/H₂O

Answer

Answer: (d)

10. Geometrical isomerism is exhibited by
(A) 2-Butene
(B) 2-Butyne
(C) 2-Butenol
(D) Butanol

Answer

Answer: (d)