1.

The boiling point of 0.1 molal aqueous solution of urea is 100.18 ^(@)C atm. The molal elevation constant of water is

Answer»

1.8
0.18
18
18.6

Solution :`K_(B) = (DELTA T_(b))/m=(T_(b)-T^(@))/m=(100.18 -100)/0.1=0.18/0.1=1.8^(@)`


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