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

Answer

set 1 - A; set 2 - 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,+Iprop1/("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)