First slide

Gaseous state

Question

Densities of CO and N₂are in the ratio of 1 : 2 and their temperatures are in the ratio of 2 :1. Thus the ratio of their pressure is

Moderate

A

1 : 1
B

1 : 2
C

2 : 1
D

4 : 1

Solution

$p = \frac{dRT}{m} \Rightarrow \frac{p_{1}}{p_{2}} = \frac{d_{1} T_{1} m_{2}}{d_{2} T_{2} m_{1}} = \frac{1 \times 2 \times 28}{2 \times 1 \times 28} = 1$

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