Question

what are the reagents used to distinguish between propene and propyne
a.grignard reagent
b.ammonical agno3
c.lucas reagent
d.ammonical cucl2

Answer 1

Answer:

propene and propyne distinguished by Ammonical silver nitrate test.

so show your answer will be (B)

Answer 2

The reagent that is used to distinguish between propene and propyne is:

(b) Ammonical AgNO3.

- Propyne contains acidic hydrogen atoms in it.

- Hence, it gives white precipitate with ammonical silver nitrate solution as follows:

CH3-C≡CH + NH3 + AgNO3 → CH3-C≡C.Ag (white ppt) + NH4NO3

- Whereas propene does not react with ammonical AgNO3 due to absence of acidic hydrogen.

- So, propene and propyne can be distinguished by ammonical AgNO3 solution.