MHT CET 2025 Chemistry question

What is the number of moles of hydrogen atoms required to reduce one mole of nitroethane completely using Sn and HCl?

(A)2
(B)3
(C)4
(D)6Correct

Answer: (D)

Solution

Sn + HCl generates nascent hydrogen, which reduces the nitro group completely to the amino group: CH_3CH_2NO_2 + 6[H] \xrightarrow{Sn/HCl} CH_3CH_2NH_2 + 2H_2O. Counting: removal of two O atoms as needs 4 H, and the formation of the group (two N-H bonds) needs 2 more H, a total of 6 mol of H

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Question ID VK-102528