Which of the following compound is highly reactive towards HCN?

1. $\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{CHO}$
2. $\mathrm{H}-\mathrm{CHO}$
3. $\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{CH}_{3}$
4. $\mathrm{CH}_{3}-\mathrm{CHO}$

Solution

Asked in: MHT CET 2020 (19 Oct Shift 2)

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