Question

a gaseous mixture contain 4 gases A,B,C,D.the mole fraction of B is 0.5 mole fraction of A is

Answer 1

Answer: -

Let the mole fraction of A be denoted by Xa.

Let the mole fraction of B be denoted by Xb.

Xb = 0.5

Let the mole fraction of C be denoted by Xc.

Let the mole fraction of D be denoted by Xd.

Since A,B,C,D are all present together,

Xa + Xb + Xc + Xd = 1

Xa + Xc + Xd = 1 - Xb

= 1 - 0.5

= 0.5

Thus Xa must be less than 0.5.

According to the options given in the question only 0.375 is less than 0.5.

Thus Mole fraction of A = Xa = 0.375.