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NEET levelSingle correct optionDifficulty 1 of 3ck111

A gaseous reaction $A (g) B (g) + C (g)$ is carried out in a rigid closed vessel starting with pure A at pressure $P_{0}$ . What is the total pressure when A has been completely consumed?

A $2 P_{0}$
B $P_{0} /2$
C $P_{0}$
D $3 P_{0}$

Answer: A

Each mole of A gives two moles of gas, so at constant volume and temperature the pressure doubles. On complete reaction

P_{\infty} = 2 P_{0}

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