Question
Given below are two statements:
Statement-I: Benzene diazonium salt is prepared by the reaction of aniline with nitrous acid at $273 - 278\text{ }K$. It decomposes easily in the dry state.
Statement-II: Insertion of iodine into the benzene ring is difficult and hence iodo benzene is prepared through the reaction of benzene diazonium salt with KI.
In the light of the above statements, choose the most appropriate Ans. from the options given below:
Options
Solution
Sol. [Key Concept: Assertion–Reason — benzenediazonium salt and preparation of iodobenzene] Benzene diazonium chloride is prepared by the reaction of aniline with nitrous acid at 273-278 K.
Nitrous acid is produced in the reaction mixture by reaction of ${NaNO}_{2}$ with HCl .
Benzene diazonium chloride decomposes easily in the dry state
lodo benzene is prepared by shaking benzene diazonium salt with KI because direct insertion of iodine into benzene ring is difficult
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