Question

The decreasing order of reactivity towards electrophilic addition of the following is: I. CH = CH
II. CH_2 = CH_2
III. H_2C = CH - Cl

• A. I > II > III > IV
• B. II > I > III > IV
• C. IV > III > I > II
• D. IV > I > III > II

Hint:

In electrophilic addition reactions, more electron-donating groups lead to higher reactivity.

Answer 1

The Correct Option is B

The reactivity of alkene compounds towards electrophilic addition depends on the electron-donating ability of the substituents.
The order of reactivity is II > I > III > IV as CH2 = CH2 is more reactive than CH = CH, and the presence of a chlorine atom (H2C = CH - Cl) reduces reactivity due to its electron-withdrawing nature.