1.

Coupling of diazonium salts of following takes place in order

Answer»

`IV LT II lt III lt I`.
`IV gt III lt II lt I`.
`II lt IV lt I lt III`.
`I lt II lt III lt IV`.

SOLUTION :ELECTRON relasing power :
`C_(6)H_(5)-BAR(O) gt C_(6)H_(5)NH_(2) gt C_(6)H_(5)OH gt C_(6)H_(5)overset(+)(N)H_(3)`


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