28. A solution is obtained by dissolving 12 g of urea in a litre of water. Another solutiono is obtained by dissolving 68.4 g of cane- suger in a litre of water at the same temperature. The lowering of vapour pressure in the first solution is
a. Same as that of 2nd solution
b. Nearly one fifth of the 2nd solution
c. Double that of 2nd solution
d. Nearly five times that of 2nd solution
Ans. a
(18)
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