1.

Some meta-directing substituents in aromatic substitution are given. Which is most deactivating-

Answer»

`-COOH`
`-NO_2`
`-C-=N`
`-SO_3H`

Solution :Due to `-I` and `-R` effect, `NO_(2)` is a highly deactivating and `-CN, -SO_(3)H and -COOH` are MODERATELY deactivating meta-orienting GROUP.


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