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
• B. 3 atm
• C. 2 atm
• D. 0.5 atm

Answer 1

The correct option is A 1 atm

$P_{S{O}_2}=P\times {\chi }_{S{O}_2}$

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 $\text{A}$.