Which of the following reagents can be used to distinguish between propene and propyne?

Which of the following reagent cannot be used to distinguish between propane and propene?

Which reagent can be used to distinguish between propene and propyne-

Which reagent can be used to istinguish between the Propene and propyne?

Propyne overset("Na(l))underset(Delta)rarrX+1/2H_(2),Xoverset(CH_3)underset(Delta)rarrY Which of the following reagents can be used to distinguish Y from propyne?

Which of the following reagents cannot be used to distinguish between pebtanal and 2- pentanone ?