TS EAMCET · Chemistry · States of Matter

The variation of the compressibility factor $(Z)$ with pressure $(P in bar)$ for some gases, are shown in the figure below. Identify the gases $(A), (B)$ and $(C)$ .

A $Real Gas, N_{2}, {CO}_{2}$
B $Ideal Gas, H_{2}, {CO}_{2}$
C $Ideal Gas, {CO}_{2}, H_{2}$
D $Real Gas, H_{2}, {CO}_{2}$

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Answer & Solution

Correct Answer

(B) $Ideal Gas, H_{2}, {CO}_{2}$

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Detailed explanation

In the nature, no gas is found to be an ideal gas under all conditions of temperature and pressure. Therefore, the gases existing in nature are called as real gases. For an ideal gas, PVmRT=Z Here, Z is the compressibility factor. Z=1(for ideal gases) The extent of deviation…

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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The variation of the compressibility factor (Z) with pressure (P in bar) for some gases, are shown in the figure below. Identify the gases (A),(B) and (C).

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The variation of the compressibility factor $(Z)$ with pressure $(P in bar)$ for some gases, are shown in the figure below. Identify the gases $(A), (B)$ and $(C)$ .