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Question

Value of Henry's constant KH ?

A
increases with increase in temperature
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B
decreases with increase in temperature
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C
remains constant
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D
first increases then decreases
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Solution

The correct option is B increases with increase in temperature
According to Henry's law, solubility of a gas in a liquid is directly proportional to pressure of gas.
PαX
P=KHX
P= Partial pressure of gas
X= solubility of gas in liquid
KH= Henry's constant
KH depends only on nature of gas, nature of liquid and temperature (T). As temperature increases, 'KH' increases and 'X' decreases.
So, option (A) is correct.

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