Chemistry-Nucleophilic Addition
NEET Chemistry Nucleophilic Addition MCQ Question
Type: MCQ-numerical-Medium-Class 12
When acetaldehyde reacts with hydrogen cyanide (HCN) in the presence of a base, what is the mass of the cyanohydrin formed if 44.05 g of acetaldehyde is completely converted? (Molar mass of acetaldehyde = 44.05 g/mol, HCN = 27.03 g/mol, cyanohydrin = 85.08 g/mol)
A
85.08 g
B
44.05 g
C
27.03 g
D
56.07 g
Correct Answer
Option A
Detailed Explanation
The reaction of acetaldehyde with HCN forms a cyanohydrin. Since the reaction is 1:1, 44.05 g of acetaldehyde (1 mole) will produce 85.08 g of cyanohydrin (1 mole), based on the molar mass of the cyanohydrin.
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