HARDMCQ SINGLEJEE Mains ChemistryInorganic ChemistryCarboxylic Acids and DerivativesAchiever Section

When CH2 = CH – COOH is reduced with LiAlH , the compound obtained will be:

A.CH3 – CH2 – COOH

B.CH2 = CH – CH2OH✓ Correct

C.CH3—CH2—CHO

D.CH3 – CH2 – CH2 – OH

Explanation

4 LiAlH is a strong reducing agent and it will convert carbonyl compounds into alcohol after reduction. However, it will not reduce double bond to single bond. The reaction is as follows- 4 LiAlH 2 2 2 H C CH COOH H C CH CH OH -> Thus, the correct option is (b) 2 2 CH CH CH OH

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