| Directions: (Q. 11 to 15) |
| Case III: Read the passage given below and answer the following questions from 11 to 15. |
| Few colligative properties are : |
| Relative lowering of vapour pressure: Depends only on molar concentration of solute (mole fraction) and independent of its nature. |
| Depression in freezing point: It is proportional to the molal concentration of solution. |
| Elevation of boiling point: It is proportional to the molal concentration of solute. |
| Osmotic pressure: It is proportional to the molar concentration of solute. |
| A solution of glucose is prepared with 0.052 g at glucose in 80.2 g of water. (\[{{K}_{f}}=1.86\text{ }K\text{ }kg\,mo{{l}^{-1}}\] and \[{{K}_{b}}=5.2K\,kg\,mo{{l}^{-1}}\]) |
A) 0.0052m
B) 0.0036m
C) 0.0006 m
D) 1.29 m
Correct Answer: B
Solution :
\[m=\frac{0.052}{180}\times \frac{1000}{80.2}=0.0036\]
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