Question

Assertion (A): Alkynes show addition reactions.

Reason (R): Alkanes show substitution reactions.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Options

• (1)

• (2)

• (3)

• (4)

Answer 1

(2)

Explanation:

Alkynes contain a carbon-carbon triple bond C ≡ C and therefore undergo addition reactions. Hence, the Assertion (A) is true.

Alkanes are saturated hydrocarbons and generally undergo substitution reactions. Hence, the Reason (R) is also true.

However, the Reason does not explain why alkynes undergo addition reactions.

Hence, both A and R are true, but R is not the correct explanation of A.