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Chemistry
Which is correct about physical adsorption?
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Q. Which is correct about physical adsorption?
KEAM
KEAM 2012
Surface Chemistry
A
High temperature and high pressure favour adsorption
5%
B
High temperature and low pressure favour adsorption
11%
C
Low temperature and high pressure favour adsorption
66%
D
Low temperature and low pressure favour adsorption
12%
E
Temperature and pressure have no effect on adsorption
12%
Solution:
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.