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System, Surroundings, Intensive, Extensive Properties

Equal moles o...

Question

Equal moles of sulphur dioxide and oxygen are kept in a vessel at $27^{o} C$ . The total pressure of the mixture is 2 atm. The partial pressure of sulphur dioxide is

A

1 atm

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B

3 atm

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C

2 atm

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D

0.5 atm

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Solution

The correct option is A 1 atm
$P_{S O_{2}} = P \times χ_{S O_{2}}$

Since equal moles of two gases are present, the mole fraction of $S O_{2} = 1 / 2$

Thus, $P_{S O_{2}} = 1$

Hence, the correct answer is option $A$ .

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