MCQ on Alkene: Chemistry is considered to be the most scoring subject in NEET JEE Exam. As it is one of the easiest scoring subjects, it is often ignored and undermined a subject. But if you want to get an edge over others, here is a tip, master NEET/JEE Chemistry concepts. Chemistry demands the attention of students in understanding reactions and concrete basic understanding but once done it only gets easier from there. Mastering NCERT syllabus for NEET/JEE Chemistry should be topping your list of to-do for chemistry.

In this post we are providing you MCQ on Alkene, which will be beneficial for you in upcoming NEET, JEE, Medical and Engineering Exams.

MCQ on Alkene

 

Q1. Ethylene on reaction with bromine forms which among the following product?
a) Br₂HC-CHBr₂
b) Br₂HC=CHBr₂
c) BrH₂C=CH₂Br
d) BrH₂C-CH₂Br

Q2. Which of the following reactions is common in alkenes?
a) Addition
b) Elimination
c) Substitution
d) Superposition

Q3. 4-chlorobut-1-ene is the name of which among the following alkenes?
a) CH₂Cl-CH₂=CH-CH₂
b) CH₂Cl-CH₂-CH=CH₂
c) CH₂Cl-CH₂-CH-CH₂
d) CH₂Cl=CH₂-CH=CH₂

Q4. Cis-trans isomerism in alkenes is due to _______.
a) chiral carbon
b) free rotation about single bond
c) free rotation about the double bond
d) restricted rotation about the double bond

Q5. Which among the following is not colourless?
a) Butene
b) Ethene
c) Methene
d) Propene

Q6. Geometrical isomerism is exhibited by ______.
a) Butanol
b) 2-Butenol
c) 2-Butyne
d) 2-Butene

Q7. Which of the following will form 2 acetaldehyde molecules on ozonolysis?
a) 1-butene
b) 1-pentene
c) 2-butene
d) 2-pentene

Q8. Identify the addition reaction which is not undergone by the alkenes?
a) Halogenation
b) Hydroboration
c) Mercuration
d) Oxymercuration

Q9. Which of the following compounds react most readily with Br_(g)?
a) C₂H₂
b) C₂H₄
c) C₃H₆
d) C₄H₁₀

Q10. In Alkenes the Carbon atoms are connected to each other by a ______.
a) Single bond
b) Double bond
c) Triple bond
d) Not connected

Q11. Select the incorrect statement regarding alkenes.
a) Alkenes are less reactive than alkanes
b) Alkenes undergo polymerization reaction
c) In alkenes, the carbons are connected by pi bonds
d) Alkenes have almost same physical properties as that of the alkanes

Q12. Which of the following reagents will form 1-propanol from propene?
a) Aq. KOH
b) H₂O, H₂SO₄
c) B₂H₆, H₂O₂, OH^–
d) Hg(OAc)₂, NaBH₄/H₂O

Q13. Identify the incorrect statement regarding the synthesis of alkenes.
a) The reactions are exothermic
b) Cracking of a hydrocarbon yields alkenes
c) Zeolite catalyst helps in the synthesis of alkenes
d) The synthesis of alkenes is otherwise known as reforming

Q14. Find the alkene with maximum stability.
a) 1-Butene
b) cis-2-Butene
c) trans-2-Butene
d) All have the same stability

Q15. Which among the following alkenes is used in the manufacturing of plastics?
a) Butadiene
b) 2-butadiene
c) 1,2-butadiene
d) 1,3-butadiene

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