Q.

The four compounds given below undergo coupling with diazonium salts Choose the correct alternatives from the following regarding the reactivity of these compounds in the coupling with diazonium salt.

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a

I reacts fastest

b

II is more reactive than III and IV

c

IV reacts fastest

d

IV does not participate in the reaction

answer is 1,2.

(Detailed Solution Below)

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Detailed Solution

Due to the highest activating tendency of I, it is the fastest reacting species in coupling of diazonium salt- Similarly, due to same reason III is more reactive than IV. On the other hand, due to least activating tendency of IV, it is least reactive.
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