Given below are two statements:
Statement I: The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.
Statement II: The nucleophilic addition of hydrogen cyanide to an aldehyde or a ketone yields amine as final product.
In the light of the above statements, choose the most appropriate answer from the options given below:
Statement I: The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.
Statement II: The nucleophilic addition of hydrogen cyanide to an aldehyde or a ketone yields amine as final product.
In the light of the above statements, choose the most appropriate answer from the options given below:
- (A)Statement I is true but Statement II is false.✓ Correct
- (B)Both Statement I and Statement II are true.
- (C)Both Statement I and Statement II are false.
- (D)Statement I is false but Statement II is true.
Answer: (A)
Solution
Sodium hydrogen sulphite adds across the carbonyl group and a proton transfer then gives the stable crystalline bisulphite addition ion, so the first statement is correct. Hydrogen cyanide adds to a carbonyl to give a cyanohydrin, a hydroxynitrile, not an amine, so the second statement is wrong. Statement I is true and Statement II is false.
JEE Main · 2021 · 01 Sep 2021 · Shift 2 · Single correct option