1.

+I effect is shown by

Answer»

`-CH_(3)`<BR>`-Br`
`-CI`
`-NO_(2)`

Solution :`-Br, -CI, -NO_(2)` show (-I) EFFECT as all are electron attracting or withdrawing.
`+I` effect is shown by `-CH_(3)` group only.This is electron releasing or repelling group.


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