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In the diazotisation of arylamines with sodium nitrite and hydrochloric aci

In the diazotisation of arylamines with sodium nitrite and hydrochloric acid an excess of hydrochloric acid is used primarily to A)supress the concentration of free aniline available for coupling B)suppress hydrolysis of phenol C)ensure a stoichiometric amount of nitrous acid D)neutralise the base liberated

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