Acetic acid on reduction with excess lithium aluminum hydride, results is-

• (A) ethanal
• (B) ethanol
• (C) methanal
• (D) both(A) and (B)

When acetic acid undergoes reduction with excess lithium aluminum hydride (LiAlH4), it primarily converts into ethanol. This is because lithium aluminum hydride is a strong reducing agent that can fully reduce carboxylic acids to their corresponding alcohols.

Reduction Process

The reaction can be summarized as follows:

• Acetic acid (CH3COOH) is reduced to ethanol (C2H5OH).

Key Points

Here are some important aspects to remember:

• LiAlH4 is a powerful reducing agent.
• It reduces carboxylic acids to primary alcohols.

Therefore, the correct answer is (B) ethanol.