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Question

For adsorption of a gas on solid surface, the plot of log xm vs log P is linear with slope equal to :

A
K
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B
log K
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C
1nK
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D
1n (n being integer)
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Solution

The correct option is D 1n (n being integer)

For adsorption of a gas on solid surface, the plots of log xm vs log P is linear with a slope equal to 1n ( n being integer). As the temperature increases, the constants change to reflect the empirical observation that the quantity adsorbed rises more slowly and higher pressures are required to saturate the surface. Higher the 1n value, more favorable is the adsorption.

log xm=log K+1nlog P

This is the Freundlich isotherm. Thus, slope =1n

185783_204791_ans.png

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