Which of the following will be most stable diazonium salt $R N_{2}^{+} X^{-}$ ?

C H_{3} N_{2}^{+} X^{-}

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C_{6} H_{5} N_{2}^{+} X^{-}

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C H_{3} C H_{2} N_{2}^{+} X^{-}

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C_{6} H_{5} C H_{2} N_{2}^{+} X^{-}

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Solution

The correct option is A $C_{6} H_{5} N_{2}^{+} X^{-}$
Among the given diazonium salts, benzene diazonium halide $C_{6} H_{5} N_{2}^{+} X^{-}$ is most stable due to conjugation of the $N \equiv N$ triple bond with benzene ring.

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R N_{2}^{+} X^{-}

Which of the following amine will form stable diazonium salt at 273-283 K ?

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