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Methyl halide treated with KCN and then Na in ethanol: identify product B

The same question, asked 2 times: 15 May 2023 S2*, 13 May 2024 S2. Every wording below, oldest first.

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  1. Question 1

    15 May 2023 S2

    93
    Identify product 'B' in following reaction. CH3-I+KCN→A→Na, C2H5OHB\text{CH}_3\text{-I} + \text{KCN} \to A \xrightarrow{\text{Na, C}_2\text{H}_5\text{OH}} B

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  2. Question 2

    13 May 2024 S2

    84
    Identify 'B' in the following conversions: CH3Br→KCNA→Na/C2H5OHB\text{CH}_3\text{Br}\xrightarrow{\text{KCN}}\text{A}\xrightarrow{\text{Na/C}_2\text{H}_5\text{OH}}\text{B}

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