Give one reaction of a diazonium salt in which (i) diazo group is removed (ii) diazo group is retained.

Which is NOT the reaction of diazonium salt?

The reaction in which diazonium salt is used

When an primary aromatic amine is treated with NaNO_(2)+HCI at 0^(@)-5^(@)C , a diazonium salt is formed and the reaction is called diazo reaction. In this reaction mineral acid must be added to prevent the coulping reaction of diazonium salt with excess of aryl amine. diazonium salt is highly in the synthesis of number of coloured dyes. For the following diazonium ion the decreasing order of reactivity of these ion in azo-coupling reaction:

When an primary aromatic amine is treated with NaNO_(2)+HCI at 0^(@)-5^(@)C , a diazonium salt is formed and the reaction is called diazo reaction. In this reaction mineral acid must be added to prevent the coulping reaction of diazonium salt with excess of aryl amine. diazonium salt is highly in the synthesis of number of coloured dyes. When 2,4-dinitrophenol react with NaNO_(2)+HCI at 5^(@)C followed by reaction with anisole, a coloured compound is formed which can be given as:

When an primary aromatic amine is treated with NaNO_(2)+HCI at 0^(@)-5^(@)C , a diazonium salt is formed and the reaction is called diazo reaction. In this reaction mineral acid must be added to prevent the coulping reaction of diazonium salt with excess of aryl amine. diazonium salt is highly in the synthesis of number of coloured dyes. In the given reaction. The final product is

Which one is correct group reagent for group cations?