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On the basis of data given below, predict which of the following gases shows least adsorption on a definite amount of charcoal? Ga
Question

On the basis of data given below, predict which of the following gases shows least adsorption on a definite amount of charcoal?
Gas
CO₂
SO₂
CH₄
H₂
Tc(K)
304
630
190
33

A.

CO₂

B.

SO₂

C.

CH₄

D.

H₂

Correct option is D


Adsorption is directly related to the critical temperature (Tc) of the gas. Higher Tc → Greater adsorption. Here, H₂ has the lowest critical temperature (33 K), so it exhibits least adsorption on charcoal.

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