A vessel A has volume V and a vessel B has volume 2V. Both contain some water which has a constant volume. The pressure in the space above water is $p_{a}$ for vessel A and $p_{b}$ for vessel B.

p_{a} = p_{b}

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p_{a} = 2 p_{b}

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p_{b} = 2 p_{a}

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p_{b} = 4 p_{a}

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Solution

The correct option is A $p_{a} = p_{b}$
The saturation vapour pressure depends on the temperature only for same liquid.

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