Q.

Which of the following solutions will have the lowest vapour pressure

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a

0.1M Glucose

b

0.1M NaCl

c

0.1 M BaCl2

d

0.1 M Al2(SO4)3

answer is D.

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Detailed Solution

Solution                    net concentration               0.1M Glucose                 0.1 X 1=0.1               0.1M NaCl                      0.1 X 2=0.2               0.1M BaCl2                    0.1 X 3=0.3               0.1m Al2(SO4)3              0.1 X 5=0.5As LVP increases VP  decreases order of VP is (1)>(2)>(3)>(4)
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Which of the following solutions will have the lowest vapour pressure