The resonance effect of groups is electron removing (+R) or electron a

1.	The resonance effect of groups is electron removing (+R) or electron attracting (-R)?
Answer» Solution :`+R` effect containing : In (a), `-OH` group, the MOLECULE push the ELECTRON away from it. (-R) effect containing group: In (b) `-NO_(2)`, (C ) `-CHO` (d) -`CHO` (e ) `OVERSET(+)(C )H_(2)` and (F) `overset(+)(C )H_(2)`. These molecule attract the `pi` electron towards it

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