KCET · Chemistry · States of Matter

Dalton's law of partial pressure is applicable to which one of the following systems?

A \(\mathrm{NH}_{3}+\mathrm{HCl}\)
B \(\mathrm{NO}+\mathrm{O}_{2}\)
C \(\mathrm{H}_{2}+\mathrm{Cl}_{2}\)
D \(\mathrm{CO}+\mathrm{H}_{2}\)

Verified Solution

Answer & Solution

Correct Answer

(D) \(\mathrm{CO}+\mathrm{H}_{2}\)

Step-by-step Solution

Detailed explanation

When a mixture of two or more non-reacting gases are enclosed in a container then the total pressure exerted by the gaseous mixture is equal to the sum of partial pressure of the components in the mixture. e.g. \(\mathrm{CO}+\mathrm{H}_{2}\) are non-reacting gases. Hence, Dalton's law of partial pressure is applicable to this system.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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