Incorrect statement about indigotin is:

Q. Compound $PtC{l}_4$ is more stable than $NiC{l}_4$.

Q. Statement-I : Propene is more reactive than ethene with HCl.
Statement-II : Propene is more stable than ethene.

Q. Statement-I :$M{e}_3\stackrel{+}{C}$ is more stable than $M{e}_2\stackrel{+}{C}H$ and $M{e}_2\stackrel{+}{CH}$ is more stable than the $Me\stackrel{+}{C}{H}_2$.
Statement-II : Greater the number of hyperconjugative structures, more is the stability of carbocation.