colligative

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1.
The depression in freezing point caused by a 1M NaCl solution is 0.0123Â°C. What will be the depression in freezing point caused by 1M glucose solution?

2.
When HgI2 is mixed with aqueous solution of KI then freezing point ................. .(increases/decreases/remains same)

3. (True/False)
When a liquid and its vapours are at equilibrium and the pressure is suddenly decreased cooling occurs.

[ courtesy TAPAS posted in favor of avinav's request]

#Chemistry #Physical Chemistry

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5 Answers

UTTARA ·2010-03-17 08:39:57

2) Depression in freezing point

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UTTARA ·2010-03-17 08:44:58

3)true

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rahul nair ·2010-03-17 09:02:56

1.0.0123/2

No of particles in glucose is half of tht of NaCl...

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Devil ·2010-03-17 10:36:06

I think last one is true.

Bcoz when u suddenly decrease the pressure, most of the liquid will evaporate - the internal energy of the remaining liquid supplies the enrgy reqd for the process - so cooling should occur. [12]