Tardigrade
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Tardigrade
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Chemistry
In the diazotization of aryl amines with sodium nitrite and hydrochloric acid, an excess of hydrochloric acid is used primarily to
Q. In the diazotization of aryl amines with sodium nitrite and hydrochloric acid, an excess of hydrochloric acid is used primarily to
2521
215
Punjab PMET
Punjab PMET 1998
Amines
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A
suppress the concentration of free aniline available for coupling
38%
B
suppress hydrolysis of phenol
21%
C
ensure a stoichiometric amount of nitrous acid
22%
D
neutralise the base liberated
20%
Solution:
Excess of hydrochloric acid avoids the possibility of coupling reaction by leaving no free aniline for coupling reaction.