Question

The solution having vapour pressure is
(assume 100% ionisation of electrolytes)
(a) IN KNO3 (b) IN Ba(NO3)2
(c)1 N Al2(SO4)3 (d) IN Th(NO3)4​

Answer 1

Answer:

Van't Hoff factor =i

For Ba(NO

3

)

2

,i=3; Ba+2NO

3

−

For NaCl, i=2; Na

+

+Cl

−

For Glucose, i=1

So higher the van't Hoff factor, higher is the lowering of vapor pressure

So Ba(NO

3

)

2

will have the highest lowering of vapor pressure.

Option C is correct.