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Densities of two gases are in the ratio ...

Densities of two gases are in the ratio `1: 2` and their temperatures are in the ratio `2:1`, then the ratio of their respective pressure is

A

`1 : 1`

B

`1 : 2`

C

`2 : 1`

D

`4 : 1`

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The correct Answer is:
A
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