Within each set , which compound should be more reactive toward carbonyl addition reaction ?

Answer

set 1 - A ; set2 - A ; set 3 - B ; set 4 -B ; set 5 - A ; set 6 - B ; set 7 - B ; set 8 - B ; set 9 - A ; set 10 - B

Explanation

`+M, H, + I prop (1)/("Nucleophilic attack ") " " -M,-H, -I prop` Nucleophilic attack
Set-(1) (A) - I effect of (-Br)
Set-(2)(A) - I effect of `-overset(O)overset(||)(C)-`
Set- (3) (B) `-M` effect of `-NO_(2)`
Set-(4) (B) `+M` effect of phenyl
Set-(5) (A) unstable 3-member ring
Set-(6) (B) + M of nitrogen in (A) decreases reactivity
Set-(7) (B) - M effect of `-overset(O)overset(||)(C)-O`
Set - (8) (B) - I effect of Cl
Set-(9) (A) +M effect of `-Ph`
Set-(10) (B) (aldehyde `gt` ketone )