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Which of the following is a reagent used in the preparation of benzene diazonium chloride from aniline?

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in Chemistry – Class 12 by (188k points)
Which of the following is a reagent used in the preparation of benzene diazonium chloride from aniline?

(a) Sodium hydroxide

(b) Sodium chloride

(c) Sodium nitrite

(d) Sodium nitrate

This question was posed to me in examination.

This is a very interesting question from Preparation of Haloarenes topic in portion Haloalkanes and Haloarenes of Chemistry – Class 12

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The correct option is (c) Sodium nitrite

For explanation: Sodium nitrite reacts with aqueous HCl to form NaCl and HNO2. The nitrous acid reacts with aniline in cold aqueous solution of HCl to form benzene diazonium chloride.

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