Question

Which is correct about physical adsorption?

• A. High temperature and high pressure favour adsorption
• B. High temperature and low pressure favour adsorption
• C. Low temperature and high pressure favour adsorption
• D. Low temperature and low pressure favour adsorption
• E. Temperature and pressure have no effect on adsorption

Answer 1

Answer: (C)

Adsorption being an exothermic process, is favoured by low temperature (according to Le-Chatelier’s principle).

Moreover, high pressure also favou s adsorption, because during adsorption, volume of gases decreases along with liberation of heat.