Q.

 KH value for some gases at the same temperature ‘T’ are given,

GasKH/k bar
Ar40.3
CO21.67
HCHO1.83×105
CH40.413

Where KH is Henry’s Law constant in water. The order of their solubility in water is 

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a

Ar<CO2<CH4<HCHO

b

HCHO<CO2<CH4<Ar

c

HCHO<CH4<CO2<Ar

d

Ar<CH4<CO2<HCHO

answer is A.

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Detailed Solution

Greater the values of KH for a gas, lesser is its solubility in water. So, order of solubility of gases in water is  Ar<CO2<CH4<HCHO

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