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What happens when (write chemical equations): (a) Benzaldehyde is heated with alcoholic . (b)…
(i)
What happens when (write chemical equations):
(a) Benzaldehyde is heated with alcoholic $\text{KCN}$.
(b) Formaldehyde is heated with conc. $\text{NaOH}$ solution.
(c) Acetone is treated with hydroxylamine.
(ii)
An aliphatic compound [A] with the molecular formula $\text{C}_2\text{H}_4\text{O}$ is reduced to compound [B]. Compound [B] reacts with $\text{PCl}_5$ and forms compound [C]. Compound [C] on treatment with alcoholic $\text{KOH}$ forms compound [D] which is used to make a daily use plastic.
Identify the compounds [A], [B], [C] and [D].
Answer
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From ISC 2026 Improvement Chemistry Paper 1, question 19.