With the help of suitable diagram, describe the variation in (i) chemisorption (ii) physisorption with changes in temperature and pressure of adsorbed gas. How may these diagram be used to distinguish the two of adsorption?

If space straight x over straight m left parenthesis extent space of space adsorption right parenthesis

first increases and then decreases with increase in temperature it is chemical adsorption. If it decreases with increase in temperature, it is physical adsorption.
If

straight x over straight m

increases with increase in pressure, it is physical adsorption. If it first increases and then becomes independent of pressure then it is chemical adsorption.
first increases and then decreases with increase in temperature it is

first increases and then decreases with increase in temperature it is

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