Assertion : If $\mathrm{H}_2$ and $\mathrm{Cl}_2$ enclosed separately in the same vessel exert pressure of 100 and $200 \mathrm{~mm}$ respectively, their mixture in the same vessel at the same temperature will exert a pressure of $300 \mathrm{~mm}$. Reason : Dalton's law of partial pressures states that total pressure is the sum of partial pressures.

Question

Assertion : If $\mathrm{H}_2$ and $\mathrm{Cl}_2$ enclosed separately in the same vessel exert pressure of 100 and $200 \mathrm{~mm}$ respectively, their mixture in the same vessel at the same temperature will exert a pressure of $300 \mathrm{~mm}$. Reason : Dalton's law of partial pressures states that total pressure is the sum of partial pressures., If both assertion and reason are true and reason is the correct explanation of assertion., If both assertion and reason are true but reason is not the correct explanation of assertion., If assertion is true but reason is false., If both assertion and reason are false.

MARKS App · Accepted Answer

H 2 ​ and Cl 2 ​ react chemically. Hence Dalton's law is not applicable. Dalton's law states that "at a given temperature, the total pressure exerted by two or more non-reacting gases occupying a definite volume is equal to the sum of the partial pressures of the component gases."

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