Aromatic Aldehydes Ketones and Acids - Result Question 33

40. Among the following the number of reaction(s) that produce(s) benzaldehyde is

(2015 Adv.)

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Answer:

Correct Answer: 40. $(4)$

Solution:

  1. I. Gattermann-Koch reaction.

II.

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III. Rosenmund’s reduction.

IV. Acid chloride, anhydride and ester undergo controlled reduction with di-iso-butylaluminium hydride (DIBAL-H) at $-78^{\circ} C$ to give aldehydes.