Q.

Arrange the following aqueous solutions in the order of their increasing boiling points.I. 10-2MNaClII.10-3M MgCl2III.10-4M UreaIV.10-4M NaCl

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a

I

b

III

c

II

d

IV

answer is B.

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Detailed Solution

More the value of i, more will be the elevation in boiling point. Again, more dilute solution has low boiling point. Hence, increasing order of boiling points is:10-4m Urea <10-4M NaCl<10-3M MgCl2 <10-2M NaCl      (i=1)                 (i=2)               (i=3)                   (i=2)
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