Q.
Lowering in vapour pressure is highest for
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a
0.2 m urea
b
0.1 m glucose
c
0.1 m MgSO4
d
0.1 m BaCI2
answer is D.
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Detailed Solution
Barium Chloride on dissociation gives 2 moles of Chloride ions and one mole of Barium ions so the total number of moles of ions in solution is 2+1=3.0, Higher is the van't Hoff factor greater will be the lowering of vapour pressure.The value of P°- PS is maximum for BaCl2.
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