How many groups can show `+M` effect.
`OH,-O,-NH_(2),-CHO,-COOH,-CH_(3),-NMe_(2)`

How many groups (attached with benzene ring) can show +M effect ?

Rank the following group in order of decreasing priority for R,S configuration. (a) -DF,-NH_(2),-CH_(3),-OH (b) -CH_(3),-CH_(2)CH_(3),-CH_(2)CH_(2)CH_(3),-(CH_(2))_(3)CH_(3) ( c) -NH_(2),-CH_(2)NH_(2),-CH_(3),-CH_(2)NHCH_(3) (d) -COOH,-CH_(2)OH,-H,-CHO ( e) -Cl,-CH_(3),-SH,-OH (f) -C-=CH,-CH(CH_(3))_(2),-CH_(2)CH_(3),-CH=CH_(2)

CH_(3)CH(OH)CH_(2)CH_(2)COOH

Select the principal functional group when the following groups are present in the molecule : (a) -OH, -COOH, -NO_(2) (b) -OCH_(3), OH, -Cl (c) -CHO, -CN, -OH (d) -Cl, -CONH_(2), -CHO

CH_(3)CHO+HOCH_(2)CH_(2)OH rarr