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K(H) value for Ar(g),CO(g), HCHO(g) and ...

`K_(H)` value for Ar(g),CO(g), HCHO(g) and `CH_(4)(g)` are 40.39 , 1.67 ,`1.83xx10^(-5)` and 0.413 respectively. Arrange these gases in the order of their increastively solubility.

A

`HCHO ltCH_4lt CO_2lt Ar`

B

`HCHO ltCO_2ltCH_4lt Ar`

C

`Ar ltCO_2ltCH_4ltHCHO`

D

`Ar ltCH_4ltCO_2lt HCHO`

Text Solution

Verified by Experts

The correct Answer is:
C
According to Henry.s law,
P= `K_HC`
`K_H``prop` 1/C
Where P = Partial pressure of gas
C =Concentration of gas
`K_H` = Henry.s constant
It implies that as the value of `K_H` increases, mole fraction of gas solute in solvent decreases. Hence, h,igher the `K_H` value, lower is the solubility of gas.
The order of increasing solubility of gases in `Ar lt CO_2lt CH_4lt HCHO`
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