Question
$${K_H}$$ values for $$A{r_{\left( g \right)}},C{O_{2\left( g \right)}},HCH{O_{\left( g \right)}}$$ and $$C{H_{4\left( g \right)}}$$ are $$40.39,1.67,1.83 \times {10^{ - 5}}$$ and $$0.413$$ respectively. Arrange these gases in the order of their increasing solubility.
A.
$$HCHO < C{H_4} < C{O_2} < Ar$$
B.
$$HCHO < C{O_2} < C{H_4} < Ar$$
C.
$$Ar < C{O_2} < C{H_4} < HCHO$$
D.
$$Ar < C{H_4} < C{O_2} < HCHO$$
Answer :
$$Ar < C{O_2} < C{H_4} < HCHO$$
Solution :
Higher the value of $${K_H},$$ the lower is the solubility of gas in the liquid.
Thus, the order of increasing solubility is
$$\mathop {}\limits_{{K_H}\,\,{\text{value}}\,:} \,\,\,\,\,\mathop {Ar}\limits_{40.39} < \mathop {C{O_2}}\limits_{1.67} < \mathop {C{H_4}}\limits_{0.413} < \mathop {HCHO}\limits_{1.83 \times {{10}^{ - 5}}} $$