Question

Which among the following compounds is obtained when glucose reacts with hydrogen cyanide?

• A. n-Hexane
• B. Glucose cyanohydrin
• C. Gluconic acid
• D. Saccharic acid

Hint:

When glucose reacts with hydrogen cyanide, glucose cyanohydrin is formed due to the addition of HCN to the aldehyde group.

Answer 1

The Correct Option is B

Step 1: Understanding the reaction.
When glucose reacts with hydrogen cyanide (HCN), it forms glucose cyanohydrin. This is a typical reaction of aldehydes with HCN, where the aldehyde group reacts to form a cyanohydrin.

Step 2: Analyzing the options.
(A) n-Hexane: This is not the product of the reaction with HCN.
(B) Glucose cyanohydrin: Correct — Glucose cyanohydrin is formed when glucose reacts with hydrogen cyanide.
(C) Gluconic acid: This is the product of glucose oxidation, not the reaction with HCN.
(D) Saccharic acid: This is an oxidized product, not related to the reaction with HCN.

Step 3: Conclusion.
The correct answer is (B) Glucose cyanohydrin.