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Question

The osmotic pressure of a solution at 0C is 4 atm. What will be its osmotic pressure at 546 K under similar conditions?

A
2 atm
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B
4 atm
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C
6 atm
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D
8 atm
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Solution

The correct option is D 8 atm
Osmotic pressure (π) is given by
π=CRT
where
C is the concentration (molarity)R is ideal gas constantT is temperature
Condition 1:
When temperature is 0C=273 K
π1=C×R×273 ..eq(i)

Condition 2:
When temperature is 546 K
π2=C×R×546 ..eq(ii)
Dividing both the equations:

π1π2=C×R×273C×R×5464π2=273546π2=8 atm

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