Question

Reagent which can be used to bring about the following transformation?

• A. $LiAl{H}_4$ in $(C_2{H}_5{)}_{2}O$
• B. $NaB{H}_4$ in $C_2{H}_{5}OH$
• C. PCC
• D. None of the above

Answer 1

The correct option is B $NaB{H}_4$ in $C_2{H}_{5}OH$

$LiAl{H}_4/(C_2{H}_5{)}_{2}O$ reduces esters, carboxylic acid, aldehydes and ketones.
$NaB{H}_4$ in $C_2{H}_{5}OH$ reduces only aldehydes and ketones into alcohols but not others.
PCC is an oxidising agent.
Hence, the correct answer is option (b).