Question

n-Propyl bromide on treatment with ethanolic potassium hydroxide produces
(a) propane
(b) propene
(c) propyne
(d) propanol

Answer 1

I think d. propanol is answer

Answer 2

Answer: (b) propene is the correct answer.

Explanation:

Alkyl halides are reacted with alchoholic solution of potassium hydroxide or sodium hydroxide.

They undergo dehydohalogenation reaction.

Alkenes are formed with this reaction.

In this process, halogen atom from the alpha carbon is first removed

Also hydrogen atom from the adjacent beta carbon atom is also removed me

Thus, when N-Propyl bromide when treated with ethanolic potassium hydroxide gives propene.

The other two byproducts are KBr and H2O.

Heat is supplied in this reaction.

Saytzeffs rule is used for dehydrohalogenation reaction.