Aldehydes Ketones Question 67

Question: Which of the aldehyde is most reactive-

[DCE 2004]

Options:

A) $ C_6H_5-CHO $

B) $ CH_3CHO $

C) $ HCHO $

D) All the equally reactive

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Answer:

Correct Answer: C

Solution:

Among Carbonyl Compounds, reactivity decrease with increase in alkyl groups as alkyl groups (+I effect) decrease positive character on C-atom. Thus, the correct order of reactivity is $ HCHO>CH_3CHO>C_6H_5CHO $