Question

A toxic compound “A” when reacted with NaCN in aqueous acidic medium yields an edible cooking component and food preservative “B”. “B” is converted to “C” by dibromane and can be used as an additive to petrol to reduce emission. “C” upon reaction with oleum at 140°C yields an inhalable anesthetic “D”. Identify “A”, “B”, “C”, and “D”, respectively.

• A. Methanol; formaldehyde; methyl chloride; chloroform
• B. Ethanol; acetonitrile; ethylamine; ethylene
• C. Methanol; acetic acid; ethanol; diethyl ether
• D. Acetaldehyde; 2-hydroxyethane; acetic acid; propanoic acid

Hint:

Organic compound transformations depend on reactions like nucleophilic substitution and addition of reagents like dibromane and oleum.

Answer 1

The Correct Option is C

- A is methanol because it reacts with NaCN in an acidic medium to form formaldehyde (B). 
- B is formaldehyde, which is then converted to methyl chloride (C) by dibromane. 
- C (methyl chloride) reacts with oleum at 140°C to form chloroform (D), which is an anesthetic. 
Thus, the correct answer is (3).