Question
Question: The partial pressure of three gases A, B and C enclosed in a container are in the ratio 1 : 2 : 3. I...
The partial pressure of three gases A, B and C enclosed in a container are in the ratio 1 : 2 : 3. If the molecular weights of A, B and C are in the ratio 6 : 3 : 2, then the ratio by weights they are taken in the container is –
A
1 : 1 : 1
B
1 : 3 : 9
C
1 : 4 : 9
D
36 : 9 : 4
Answer
1 : 1 : 1
Explanation
Solution
We know that P ∝ n Ž n ∝ P
Ž Ratio of moles of A : B : C = 1 : 2 : 3
and Ratio of molecular wt. of A, B, C = 6 : 3 : 2
Ž Ratio of wt. of A, B & C = 1 × 6 : 2 × 3 : 3 × 2
= 6 : 6 : 6
= 1 : 1 : 1