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प्रश्न
A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation `x/m = kp^0.5`·
Adsorption of the gas increases with:
विकल्प
decrease in p and increase in T.
increase in p and decrease in T.
decrease in p and decrease in T.
increase in p and increase in T.
MCQ
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उत्तर
Increase in p and decrease in T.
Explanation:
According to the Freundlich adsorption isotherm `x/m = kp^0.5` for physical adsorption, adsorption increases with an increase in pressure (p). Also, physical adsorption is exothermic and decreases with a rise in temperature; thus, adsorption increases when temperature decreases. Hence, adsorption increases with increasing pressure and decreasing temperature.
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