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  4. In the diazotization of aryl amines with sodium nitrite and hydrochloric acid, an excess of hydrochloric acid is used primarily to

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Q. In the diazotization of aryl amines with sodium nitrite and hydrochloric acid, an excess of hydrochloric acid is used primarily to

Punjab PMETPunjab PMET 1998Amines

Solution:

Excess of hydrochloric acid avoids the possibility of coupling reaction by leaving no free aniline for coupling reaction.