The reactivities of these ions in azo-coupling reactions will be in the order:

3 < 1 < 4 < 2

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1 < 4 < 2 < 3

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1 < 2 < 3 < 4

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3 < 1 < 2 < 4

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Solution

The correct option is C $1 < 2 < 3 < 4$
In azo-coupling, the diazonium ion should be more electrophilic for more reactivity. Presence of electron-withdrawing groups increase the reactivity.
Considering these factors, the order of reactivity should be:
$1 < 2 < 3 < 4$

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The reactivities of these ions in azo-coupling reactions will be in the order:

The correct option is C 1<2<3<4In azo-coupling, the diazonium ion should be more electrophilic for more reactivity. Presence of electron-withdrawing groups increase the reactivity.Considering these factors, the order of reactivity should be:1<2<3<4

The correct option is C $1 < 2 < 3 < 4$
In azo-coupling, the diazonium ion should be more electrophilic for more reactivity. Presence of electron-withdrawing groups increase the reactivity.
Considering these factors, the order of reactivity should be:
$1 < 2 < 3 < 4$