Q.

What does the graph of these curves conclude?

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a

At constant pressure, physisorption increases with increase in temperature

b

At variable pressure, physisorption increases with increase in temperature

c

At constant pressure, physisorption decreases with increase in temperature

d

At variable pressure, physisorption decreases with increase in temperature

answer is C.

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Detailed Solution

Since physical adsorption is an exothermic process, it occurs more readily at lower temperatures and decreases with increase in temperature (Le-Chatelier's Principle).
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