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Physics Question on kinetic theory

Air inside a closed container is saturated with water vapour. The air pressure is p and the saturated vapour pressure of water is p‾\overline{p}. If the mixture is compressed to one-half of its volume by maintaining temperature constant, the pressure becomes

A

2(p+p‾) 2 (p + \overline{p})

B

2p+p‾ 2 p + \overline{p}

C

(p+p‾)/2(p + \overline{p}) / 2

D

p+2p‾ p + 2 \overline{p}

Answer

2p+p‾ 2 p + \overline{p}

Explanation

Solution

Given that the air inside a closed container is saturated with water vapour so, if the temperature remains constant, the saturated vapour pressure does not change