Q.

Statement - I : Reaction of benzaldehyde with formaldehyde in presence of base is crossed Cannizaro’s reaction.
Statement - II : Formaldehyde is always oxidized in this reaction because it is better oxidising agent.

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a

Both statements I and II are correct

b

Statement-I is incorrect and statement-II is correct

c

Both statements I and II are incorrect

d

Statement-I is correct and statement-II is incorrect

answer is B.

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Detailed Solution

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Crossed Cannizzaro reaction between formaldehyde and benzaldehyde-

C6H5CHO(Benzaldehyde) + HCHO(Formaldehyde) NaOH HCOOH+C6H5CH2OH

As there is no electron donating group on formaldehyde, the initial nucleophilic addition of hydroxide ion is faster on formaldehyde due to which formaldehyde oxidises easily and forms formic acid.
Hence the alcohol formed is only benzyl alcohol and not methanol.

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