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Solution


Q.

Arrange the following compounds in increasing order of rate of aromatic electrophilic substitution reaction.      [2023]
1 d, b, a, c  
2 b, c, a, d  
3 c, a, b, d  
4 d, b, c, a  

Ans.

(3)

Due to increase in electron density in the ring, rate of ArSE2 increases, ERG increases the electron density.