| Direction (Q. Nos. 60): For the following questions choose the correct answers from the codes a, b, c and d defined as follows. |
| Statement I The vapour pressure of 0.1 M sugar solution is more that of 0.1 M KCI solution. |
| Statement II Lowering of vapour pressure is directly proportional to the number of species present in the solution. |
A) Statement I is true. Statement II is also true and Statement II is the correct explanation of Statement I.
B) Statement I is true. Statement II is also true and Statement II is not the correct explanation of Statement I.
C) Statement I is true. Statement II is false.
D) Statement I is false. Statement II is true.
Correct Answer: C
Solution :
Relative loweing in vapour pressure is a colligative properties, i.e., depends upon the number of particles. More the number of particles lower is the vapour pressure. Thus, 0.1 M sugar solution has higher vapour pressure is directly proportional to the mole fraction of the solute \[({{x}_{B}})\]. \[\frac{{{p}^{o}}-p}{{{p}^{o}}}\propto {{x}_{B}}\]
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