02. Lowering of Vapour Pressure
SOLUTIONS

277359 Vapour pressure of water at $293 \mathrm{~K}$ is $\mathbf{1 7 . 5 3 5}$ $\mathrm{mm} \mathrm{Hg}$. The vapour pressure of water at $293 \mathrm{~K}$ containing $25 \mathrm{~g}$ of glucose dissolved in $450 \mathrm{~g}$ of water is

1 $17.439 \mathrm{~mm} \mathrm{Hg}$
2 $17.535 \mathrm{~mm} \mathrm{Hg}$
3 $0.097 \mathrm{~mm} \mathrm{Hg}$
4 $34.973 \mathrm{~mm} \mathrm{Hg}$
SOLUTIONS

277360 Which one of the following is the ratio of the lowering of vapour pressure of $0.1 \mathrm{M}$ aqueous solutions of $\mathrm{BaCl}_{2}, \mathrm{NaCl}$ and $\mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3}$ respectively?

1 $3: 2: 5$
2 $5: 2: 3$
3 $5: 3: 2$
4 $2: 3: 5$
SOLUTIONS

277361 $45 \mathrm{~g}$ of ethylene glycol $\left(\mathrm{C}_{2} \mathrm{H}_{6} \mathrm{O}_{2}\right)$ is mixed with $600 \mathrm{~g}$ of water, what is the depression of freezing point?

1 $7.9 \mathrm{~K}$
2 $2.5 \mathrm{~K}$
3 $6.6 \mathrm{~K}$
4 $2.2 \mathrm{~K}$
SOLUTIONS

277379 Freezing point of an aqueous solution is $-0.186^{\circ} \mathrm{C}$. If the values of $K_{b}$ and $K_{f}$ of water are respectively $0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$ and $1.86 \mathrm{~K} \mathrm{~kg}^{-1}$ $\mathrm{mol}^{-1}$ then the elevation of boiling point of the solution in $K$ is

1 0.52
2 1.04
3 1.34
4 0.134
5 0.052
SOLUTIONS

277359 Vapour pressure of water at $293 \mathrm{~K}$ is $\mathbf{1 7 . 5 3 5}$ $\mathrm{mm} \mathrm{Hg}$. The vapour pressure of water at $293 \mathrm{~K}$ containing $25 \mathrm{~g}$ of glucose dissolved in $450 \mathrm{~g}$ of water is

1 $17.439 \mathrm{~mm} \mathrm{Hg}$
2 $17.535 \mathrm{~mm} \mathrm{Hg}$
3 $0.097 \mathrm{~mm} \mathrm{Hg}$
4 $34.973 \mathrm{~mm} \mathrm{Hg}$
SOLUTIONS

277360 Which one of the following is the ratio of the lowering of vapour pressure of $0.1 \mathrm{M}$ aqueous solutions of $\mathrm{BaCl}_{2}, \mathrm{NaCl}$ and $\mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3}$ respectively?

1 $3: 2: 5$
2 $5: 2: 3$
3 $5: 3: 2$
4 $2: 3: 5$
SOLUTIONS

277361 $45 \mathrm{~g}$ of ethylene glycol $\left(\mathrm{C}_{2} \mathrm{H}_{6} \mathrm{O}_{2}\right)$ is mixed with $600 \mathrm{~g}$ of water, what is the depression of freezing point?

1 $7.9 \mathrm{~K}$
2 $2.5 \mathrm{~K}$
3 $6.6 \mathrm{~K}$
4 $2.2 \mathrm{~K}$
SOLUTIONS

277379 Freezing point of an aqueous solution is $-0.186^{\circ} \mathrm{C}$. If the values of $K_{b}$ and $K_{f}$ of water are respectively $0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$ and $1.86 \mathrm{~K} \mathrm{~kg}^{-1}$ $\mathrm{mol}^{-1}$ then the elevation of boiling point of the solution in $K$ is

1 0.52
2 1.04
3 1.34
4 0.134
5 0.052
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SOLUTIONS

277359 Vapour pressure of water at $293 \mathrm{~K}$ is $\mathbf{1 7 . 5 3 5}$ $\mathrm{mm} \mathrm{Hg}$. The vapour pressure of water at $293 \mathrm{~K}$ containing $25 \mathrm{~g}$ of glucose dissolved in $450 \mathrm{~g}$ of water is

1 $17.439 \mathrm{~mm} \mathrm{Hg}$
2 $17.535 \mathrm{~mm} \mathrm{Hg}$
3 $0.097 \mathrm{~mm} \mathrm{Hg}$
4 $34.973 \mathrm{~mm} \mathrm{Hg}$
SOLUTIONS

277360 Which one of the following is the ratio of the lowering of vapour pressure of $0.1 \mathrm{M}$ aqueous solutions of $\mathrm{BaCl}_{2}, \mathrm{NaCl}$ and $\mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3}$ respectively?

1 $3: 2: 5$
2 $5: 2: 3$
3 $5: 3: 2$
4 $2: 3: 5$
SOLUTIONS

277361 $45 \mathrm{~g}$ of ethylene glycol $\left(\mathrm{C}_{2} \mathrm{H}_{6} \mathrm{O}_{2}\right)$ is mixed with $600 \mathrm{~g}$ of water, what is the depression of freezing point?

1 $7.9 \mathrm{~K}$
2 $2.5 \mathrm{~K}$
3 $6.6 \mathrm{~K}$
4 $2.2 \mathrm{~K}$
SOLUTIONS

277379 Freezing point of an aqueous solution is $-0.186^{\circ} \mathrm{C}$. If the values of $K_{b}$ and $K_{f}$ of water are respectively $0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$ and $1.86 \mathrm{~K} \mathrm{~kg}^{-1}$ $\mathrm{mol}^{-1}$ then the elevation of boiling point of the solution in $K$ is

1 0.52
2 1.04
3 1.34
4 0.134
5 0.052
SOLUTIONS

277359 Vapour pressure of water at $293 \mathrm{~K}$ is $\mathbf{1 7 . 5 3 5}$ $\mathrm{mm} \mathrm{Hg}$. The vapour pressure of water at $293 \mathrm{~K}$ containing $25 \mathrm{~g}$ of glucose dissolved in $450 \mathrm{~g}$ of water is

1 $17.439 \mathrm{~mm} \mathrm{Hg}$
2 $17.535 \mathrm{~mm} \mathrm{Hg}$
3 $0.097 \mathrm{~mm} \mathrm{Hg}$
4 $34.973 \mathrm{~mm} \mathrm{Hg}$
SOLUTIONS

277360 Which one of the following is the ratio of the lowering of vapour pressure of $0.1 \mathrm{M}$ aqueous solutions of $\mathrm{BaCl}_{2}, \mathrm{NaCl}$ and $\mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3}$ respectively?

1 $3: 2: 5$
2 $5: 2: 3$
3 $5: 3: 2$
4 $2: 3: 5$
SOLUTIONS

277361 $45 \mathrm{~g}$ of ethylene glycol $\left(\mathrm{C}_{2} \mathrm{H}_{6} \mathrm{O}_{2}\right)$ is mixed with $600 \mathrm{~g}$ of water, what is the depression of freezing point?

1 $7.9 \mathrm{~K}$
2 $2.5 \mathrm{~K}$
3 $6.6 \mathrm{~K}$
4 $2.2 \mathrm{~K}$
SOLUTIONS

277379 Freezing point of an aqueous solution is $-0.186^{\circ} \mathrm{C}$. If the values of $K_{b}$ and $K_{f}$ of water are respectively $0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$ and $1.86 \mathrm{~K} \mathrm{~kg}^{-1}$ $\mathrm{mol}^{-1}$ then the elevation of boiling point of the solution in $K$ is

1 0.52
2 1.04
3 1.34
4 0.134
5 0.052