question_answer

Reaction by which benzaldehyde cannot be prepared?

A)  

B)  

C)  

D)  

Correct Answer: D

Solution :

  [a] This reaction is known as Etard reaction. [b] This reaction is called Rosenmund reaction. [c] The   above   reaction   is   known as Gattermann-Koch aldehyde synthesis. [d] Thus, from the reagents given in option [d] Benz aldehyde is not obtained.