INTRODUCTION TO ALKENES AND THEIR PHYSICAL PROPERTIES ASSIGNMENT

This set of Organic Chemistry Multiple Choice Questions & Answers (MCQs) focuses on “Alkenes”.

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

2. Which among these is not a structural isomer of the compound C4H8
a) But-1-ene
b) But-2-ene
c) But-3-ene
d) 2-methylpropene

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

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

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

6. Identify the one which shows E-Z mechanism
a) 3-methylpent-2-ene
b) 2-methylpent-2-ene
c) Methyl-3-pent-2-ene
d) 2,3-methylpentene

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

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

9. 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

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