In the diazotisation of aniline with sodium nitrite and hydrochloric acid, an excess of hydrochloric acid is used primarily to
  • A
    Suppress the concentration of free aniline available for coupling
  • B
    Suppress hydrolysis of phenol
  • C
    Insure a stoichiometric amount of nitrous acid
  • D
    Neutralize the base liberated
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