Q. 265.0( 2 Votes )

KH value for Ar(g), CO2(g), HCHO (g) and CH4(g) are 40.39, 1.67, 1.83×10–5 and 0.413 respectively.

Arrange these gases in the order of their increasing solubility.

A. HCHO < CH4 < CO2 < Ar

B. HCHO < CO2 < CH4 < Ar

C. Ar < CO2 < CH4 < HCHO

D. Ar < CH4 < CO2 < HCHO

Answer :

The higher the Kh lower is the solubility of the gas in the solvent.


More pressure is required to dissolve a gas with higher Kh.


Thus, the correct increasing order of the solubility is Ar < CO2 < CH4 < HCHO.


Thus, Option(iii) is the correct answer.

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