Question

Which of the following gases diffuse more quickly than fluorine gas? Select all that apply.

	A.	Ne
	B.	NO
	C.	N2O
	D.	Cl2
	E.	O2
	F.	H2S
	G.	C2H2

Answer 1

Solution :

The correct options are:

Ne, NO, O2 , H2S, C2H2

Rate of diffusion is inversely proportional to the square root of molecular weight of the gas. Hence, rate of diffusion decreases with increasing the molecular weight.

The approximate molecular weights for the given gases are:

F2 = 38 g mol-1

Ne = 20 g mol-1

NO = 30 g mol-1

N2O = 44.0 g mol-1

Cl2 = 71 g mol-1

O2 = 32 g mol-1

H2S = 34 g mol-1

C2H2 = 26 g mol-1

Thus, the molecular weight of Ne, NO, O2, H2S and C2H2 are smaller than F2. Hence, these gases diffuses quickly than F2.