02. Lowering of Vapour Pressure
SOLUTIONS

277367 The weight in gram, of the non-volatile solute urea $\left(\mathrm{NH}_{2} \mathrm{CONH}_{2}\right)$ to be dissolved in $100 \mathrm{~g}$ of water in order to decrease its vapour pressure by $1.8 \%$ is

1 6.0
2 0.3
3 3.0
4 0.6
SOLUTIONS

277368 At a particular temperature, the vapour pressures of two liquids $A$ and $B$ are respectively 120 and $180 \mathrm{~mm}$ of mercury. If 2 moles of $A$ and 3 moles of $B$ are mixed to form an ideal solution, the vapour pressure of the solution at the same temperature will be (in mm of mercury)

1 156
2 145
3 150
4 108
SOLUTIONS

277369 What will be the freezing point of a $1 \%$ solution of glucose in water, given that molal depression constant for water is $1.84 \mathrm{~K} \mathrm{~kg}$ $\mathrm{mol}^{-1}$ ?

1 $272.898 \mathrm{~K}$
2 $0.102^{\circ} \mathrm{C}$
3 $273 \mathrm{~K}$
4 $0.108^{\circ} \mathrm{C}$
SOLUTIONS

277371 $0.4 \mathrm{~g}$ of $\mathrm{H}_{2}, 22 \mathrm{~g}$ of $\mathrm{CO}_{2}$ and $6.4 \mathrm{~g}$ of $\mathrm{SO}_{2}$ are taken in a container. Total pressure is found to be $1.6 \mathrm{~atm}$. What is the partial pressure of $\mathrm{CO}_{2}$ gas in the mixture?

1 $1.0 \mathrm{~atm}$
2 $0.8 \mathrm{~atm}$
3 $0.6 \mathrm{~atm}$
4 $1.6 \mathrm{~atm}$
SOLUTIONS

277373 $58.4 \mathrm{~g}$ of $\mathrm{NaCl}$ and $180 \mathrm{~g}$ of glucose were separately dissolved in $1000 \mathrm{ml}$ of water. Identify the correct statement regarding the elevation of boiling point (b.p) of the resulting solutions.

1 $\mathrm{NaCl}$ solution will show higher elevation of boiling point
2 Glucose solution will show higher elevation of boiling point
3 Both the solutions will show equal elevation of boiling point
4 The boiling point elevation will be shown by neither of the solutions
SOLUTIONS

277367 The weight in gram, of the non-volatile solute urea $\left(\mathrm{NH}_{2} \mathrm{CONH}_{2}\right)$ to be dissolved in $100 \mathrm{~g}$ of water in order to decrease its vapour pressure by $1.8 \%$ is

1 6.0
2 0.3
3 3.0
4 0.6
SOLUTIONS

277368 At a particular temperature, the vapour pressures of two liquids $A$ and $B$ are respectively 120 and $180 \mathrm{~mm}$ of mercury. If 2 moles of $A$ and 3 moles of $B$ are mixed to form an ideal solution, the vapour pressure of the solution at the same temperature will be (in mm of mercury)

1 156
2 145
3 150
4 108
SOLUTIONS

277369 What will be the freezing point of a $1 \%$ solution of glucose in water, given that molal depression constant for water is $1.84 \mathrm{~K} \mathrm{~kg}$ $\mathrm{mol}^{-1}$ ?

1 $272.898 \mathrm{~K}$
2 $0.102^{\circ} \mathrm{C}$
3 $273 \mathrm{~K}$
4 $0.108^{\circ} \mathrm{C}$
SOLUTIONS

277371 $0.4 \mathrm{~g}$ of $\mathrm{H}_{2}, 22 \mathrm{~g}$ of $\mathrm{CO}_{2}$ and $6.4 \mathrm{~g}$ of $\mathrm{SO}_{2}$ are taken in a container. Total pressure is found to be $1.6 \mathrm{~atm}$. What is the partial pressure of $\mathrm{CO}_{2}$ gas in the mixture?

1 $1.0 \mathrm{~atm}$
2 $0.8 \mathrm{~atm}$
3 $0.6 \mathrm{~atm}$
4 $1.6 \mathrm{~atm}$
SOLUTIONS

277373 $58.4 \mathrm{~g}$ of $\mathrm{NaCl}$ and $180 \mathrm{~g}$ of glucose were separately dissolved in $1000 \mathrm{ml}$ of water. Identify the correct statement regarding the elevation of boiling point (b.p) of the resulting solutions.

1 $\mathrm{NaCl}$ solution will show higher elevation of boiling point
2 Glucose solution will show higher elevation of boiling point
3 Both the solutions will show equal elevation of boiling point
4 The boiling point elevation will be shown by neither of the solutions
SOLUTIONS

277367 The weight in gram, of the non-volatile solute urea $\left(\mathrm{NH}_{2} \mathrm{CONH}_{2}\right)$ to be dissolved in $100 \mathrm{~g}$ of water in order to decrease its vapour pressure by $1.8 \%$ is

1 6.0
2 0.3
3 3.0
4 0.6
SOLUTIONS

277368 At a particular temperature, the vapour pressures of two liquids $A$ and $B$ are respectively 120 and $180 \mathrm{~mm}$ of mercury. If 2 moles of $A$ and 3 moles of $B$ are mixed to form an ideal solution, the vapour pressure of the solution at the same temperature will be (in mm of mercury)

1 156
2 145
3 150
4 108
SOLUTIONS

277369 What will be the freezing point of a $1 \%$ solution of glucose in water, given that molal depression constant for water is $1.84 \mathrm{~K} \mathrm{~kg}$ $\mathrm{mol}^{-1}$ ?

1 $272.898 \mathrm{~K}$
2 $0.102^{\circ} \mathrm{C}$
3 $273 \mathrm{~K}$
4 $0.108^{\circ} \mathrm{C}$
SOLUTIONS

277371 $0.4 \mathrm{~g}$ of $\mathrm{H}_{2}, 22 \mathrm{~g}$ of $\mathrm{CO}_{2}$ and $6.4 \mathrm{~g}$ of $\mathrm{SO}_{2}$ are taken in a container. Total pressure is found to be $1.6 \mathrm{~atm}$. What is the partial pressure of $\mathrm{CO}_{2}$ gas in the mixture?

1 $1.0 \mathrm{~atm}$
2 $0.8 \mathrm{~atm}$
3 $0.6 \mathrm{~atm}$
4 $1.6 \mathrm{~atm}$
SOLUTIONS

277373 $58.4 \mathrm{~g}$ of $\mathrm{NaCl}$ and $180 \mathrm{~g}$ of glucose were separately dissolved in $1000 \mathrm{ml}$ of water. Identify the correct statement regarding the elevation of boiling point (b.p) of the resulting solutions.

1 $\mathrm{NaCl}$ solution will show higher elevation of boiling point
2 Glucose solution will show higher elevation of boiling point
3 Both the solutions will show equal elevation of boiling point
4 The boiling point elevation will be shown by neither of the solutions
SOLUTIONS

277367 The weight in gram, of the non-volatile solute urea $\left(\mathrm{NH}_{2} \mathrm{CONH}_{2}\right)$ to be dissolved in $100 \mathrm{~g}$ of water in order to decrease its vapour pressure by $1.8 \%$ is

1 6.0
2 0.3
3 3.0
4 0.6
SOLUTIONS

277368 At a particular temperature, the vapour pressures of two liquids $A$ and $B$ are respectively 120 and $180 \mathrm{~mm}$ of mercury. If 2 moles of $A$ and 3 moles of $B$ are mixed to form an ideal solution, the vapour pressure of the solution at the same temperature will be (in mm of mercury)

1 156
2 145
3 150
4 108
SOLUTIONS

277369 What will be the freezing point of a $1 \%$ solution of glucose in water, given that molal depression constant for water is $1.84 \mathrm{~K} \mathrm{~kg}$ $\mathrm{mol}^{-1}$ ?

1 $272.898 \mathrm{~K}$
2 $0.102^{\circ} \mathrm{C}$
3 $273 \mathrm{~K}$
4 $0.108^{\circ} \mathrm{C}$
SOLUTIONS

277371 $0.4 \mathrm{~g}$ of $\mathrm{H}_{2}, 22 \mathrm{~g}$ of $\mathrm{CO}_{2}$ and $6.4 \mathrm{~g}$ of $\mathrm{SO}_{2}$ are taken in a container. Total pressure is found to be $1.6 \mathrm{~atm}$. What is the partial pressure of $\mathrm{CO}_{2}$ gas in the mixture?

1 $1.0 \mathrm{~atm}$
2 $0.8 \mathrm{~atm}$
3 $0.6 \mathrm{~atm}$
4 $1.6 \mathrm{~atm}$
SOLUTIONS

277373 $58.4 \mathrm{~g}$ of $\mathrm{NaCl}$ and $180 \mathrm{~g}$ of glucose were separately dissolved in $1000 \mathrm{ml}$ of water. Identify the correct statement regarding the elevation of boiling point (b.p) of the resulting solutions.

1 $\mathrm{NaCl}$ solution will show higher elevation of boiling point
2 Glucose solution will show higher elevation of boiling point
3 Both the solutions will show equal elevation of boiling point
4 The boiling point elevation will be shown by neither of the solutions
SOLUTIONS

277367 The weight in gram, of the non-volatile solute urea $\left(\mathrm{NH}_{2} \mathrm{CONH}_{2}\right)$ to be dissolved in $100 \mathrm{~g}$ of water in order to decrease its vapour pressure by $1.8 \%$ is

1 6.0
2 0.3
3 3.0
4 0.6
SOLUTIONS

277368 At a particular temperature, the vapour pressures of two liquids $A$ and $B$ are respectively 120 and $180 \mathrm{~mm}$ of mercury. If 2 moles of $A$ and 3 moles of $B$ are mixed to form an ideal solution, the vapour pressure of the solution at the same temperature will be (in mm of mercury)

1 156
2 145
3 150
4 108
SOLUTIONS

277369 What will be the freezing point of a $1 \%$ solution of glucose in water, given that molal depression constant for water is $1.84 \mathrm{~K} \mathrm{~kg}$ $\mathrm{mol}^{-1}$ ?

1 $272.898 \mathrm{~K}$
2 $0.102^{\circ} \mathrm{C}$
3 $273 \mathrm{~K}$
4 $0.108^{\circ} \mathrm{C}$
SOLUTIONS

277371 $0.4 \mathrm{~g}$ of $\mathrm{H}_{2}, 22 \mathrm{~g}$ of $\mathrm{CO}_{2}$ and $6.4 \mathrm{~g}$ of $\mathrm{SO}_{2}$ are taken in a container. Total pressure is found to be $1.6 \mathrm{~atm}$. What is the partial pressure of $\mathrm{CO}_{2}$ gas in the mixture?

1 $1.0 \mathrm{~atm}$
2 $0.8 \mathrm{~atm}$
3 $0.6 \mathrm{~atm}$
4 $1.6 \mathrm{~atm}$
SOLUTIONS

277373 $58.4 \mathrm{~g}$ of $\mathrm{NaCl}$ and $180 \mathrm{~g}$ of glucose were separately dissolved in $1000 \mathrm{ml}$ of water. Identify the correct statement regarding the elevation of boiling point (b.p) of the resulting solutions.

1 $\mathrm{NaCl}$ solution will show higher elevation of boiling point
2 Glucose solution will show higher elevation of boiling point
3 Both the solutions will show equal elevation of boiling point
4 The boiling point elevation will be shown by neither of the solutions