A mixture of three gases A, B and C contained C2H6 , C2H4 and C2H2 . When that mixture is passed through ammonical AgNO3 solution, then 'A' and 'B' came out. On passing 'A' and 'B' through Baeyers reagent only 'B' came out then A, B and C are

When mixture of A,B and C passed through ammonical AgNO3 solution then A and B came out,indicates C is terminal alkyne[C2H2 ].When A,B  mixure passed through the Bayer's reagent,then B came out,so A must be unsaturated compound[C2H4] and B is saturated compound[C2H6].