1)

In  the cannizzaro  reaction given below 

$2Ph-CHO$   $\underrightarrow{OH^{-}}$   $ Ph-CH_{2}-OH+PhCO_{2}^{-}$

 the slowest step is 


A) the attack of $O^{-}H$ at the carbonyl group

B) the transfer of hydride ion to the carbonyl group

C) the abstraction of a proton from the carboxylic acid

D) the deprotonation of Pb- $CH_{2}OH$

Answer:

Option B

Explanation:

Hydride ion transfer to the carbonyl group is the slowest or the rate-determining steps.

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