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4. During preparation of arenediazonium salt the excess of nitrous acid, if any, is removed by adding :- 1) Aq. Na2CO3. (2) Aq. NaOH 3) Aq. NH2CONH2. (4) NH4OH

Answer» 4. During preparation of arenediazonium salt the excess of nitrous acid, if any, is removed by adding :- 1) Aq. Na2CO3. (2) Aq. NaOH 3) Aq. NH2CONH2. (4) NH4OH


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