Question

what happens when lead nitrate react with
potassium hydroxide

Answer 1

it gives pbi2
hdj

Answer 2

You know, I had no idea what the reaction was, but it took about one minute online to discover

Pb(NO3)2(aq) + 2KOH(aq) -> 2KNO3(aq) + Pb(OH)2(s)

You might try something like that before posting such a problem.