Question

Assertion : 2-Bromobutane on reaction with sodium ethoxide in ethanol gives 1-butene as a major product. 

Reason : 1 -Butene is more stable than 2-butene.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (d) A and R are false

Explanation:

2-Bromobutane on reaction with sodium ethoxide in ethanol gives 2-butene as a major product.

This is according to Saytzeff''s rule i.e. the predominant product is the most substituted alkene, 2-butene is more stable than 1-butene due to presence of large number of hyperconjugating structures in 2-butene.