Question

Ammonia gas diffuses twice as fast as gas x. The gas X is
A) SO2
B)C4H10
C)C5H8
D)Cl2

Answer 1

HII✨✔✔

HERE IS YOUR ANSWER ☺☺

RATE IS INVERSELY PROPORTIONAL TO SQUARE ROOT OF MOLECULAR MASS .

SO THE ANSWER IS OPTION C

Answer 2

According to the Graham's Law of Diffusion,

Rate is inversely proportional to the square root of the molecular mass of the compound

So,
R1/R2 = √M2/M1
Thus, the rate of NH3 to be double the molecular mass of the compound X should be 4 times the molar mass of Ammonia.
Molar mass of NH3 = 17
Thus, Molar mass of Gas X should be 17*4 = 68.

And we know that the molar mass of C5H8 is 68 ( 5*Mass of carbon + 8* Hydrogen = 5*12+8*1 = 68)

Hence, the answer should be C) C5H8.