COMEDK · Chemistry · 17. Solutions

Choose the incorrect statement:

A Higher the \(\mathrm{K}_{\mathrm{H}}\) value for a gas at a given pressure, higher is its solubility in that solvent.
B \(\mathrm{K}_{\mathrm{H}}\) value for a gas present in a given solvent depends on the nature of solute and solvent.
C \(\mathrm{K}_{\mathrm{H}}\) value changes with change in the partial pressure of the gas.
D \(\mathrm{K}_{\mathrm{H}}\) value is temperature dependent.

Verified Solution

Answer & Solution

Correct Answer

(A) Higher the \(\mathrm{K}_{\mathrm{H}}\) value for a gas at a given pressure, higher is its solubility in that solvent.

Step-by-step Solution

Detailed explanation

By Henry's Law: \(p = K_H \cdot x\), where \(x\) is the mole fraction (solubility) of gas. Rearranging: \(x = \dfrac{p}{K_H}\) At a given pressure, solubility \(x\) is inversely proportional to \(K_H\). Higher \(K_H\) \(\to\) lower solubility. (1) Incorrect: Higher \(K_H\) means…

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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