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Question

A plot of log xm versus log P for the adsorption of a gas on a solid gives a straight line with slope equal to:

A
n
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B
1n
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C
log K
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D
- log K
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Solution

The correct option is B 1n

If we take our original equation,
xm=k.P1n
Applying log on both sides, we get
log(xm)=log(k.P1n)
log(xm)=log k+1nlog P
If we compare this to a straight line equation, y = mx + c
You can see that y is log (xm),
mx is 1nlog P
c is log K
So the answer is 1n

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