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In two different vessels X andY, H(2)O(l...

In two different vessels X andY, `H_(2)O(l)` is kept at the same temperature, the vacant space left over the surface of `H_(2)O(l)` is V and 3 V respectively. What is the mass ratio of vapours in two vessels?

A

`1:3`

B

`3:1`

C

`1:4`

D

`1:1`

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a
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