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A solution is obtained by dissolving 0.2 moles of urea in a liltre of water. Another solution is obtained by dissolving 0.4mole of glucose in a litre of water at the same temperature. The lowering of vapour pressure in the first solution is

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Same as that of the second solution

Double to that of the second solution

Half to that of second solution

Can not be compared

answer is B.

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Detailed Solution

Colligative property depends upon no. of solute particles. As the no. of solute particles in the I solution is half to that of II solution its lowering of vapour pressure becomes half to that of second solution.

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