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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 diborane and can be used as an additive to petrol to reduce emission. “C” upon reaction wit h oleum at 140°C yields an inhalable anesthetic “D”. Identify “A”, “B”, “C” and “D”, respectively.

1. Ethanol; acetonitrile; ethylamine; ethylene
2. Methanol; formaldehyde; methyl chloride; chloroform
3. Methanol; acetic acid; ethanol; diethyl ethe r
4. Acetaldehyde; 2 - hydroxypropanoic acid; propanoic acid; dipropyl ether

Correct answer: Methanol; acetic acid; ethanol; diethyl ethe r

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