I'm late - but having not looked at the answers yet I'm taking a guess:

(1) Top Set on K J 8 5 2 rainbow board

(2) 56s straight flush flopped with 2 3 4 of the suit - cannot be beat

(3) 78s

(4) 9Ts

(5) 55%

(6) I dunno this one

(7) I dunno