02. Lowering of Vapour Pressure
SOLUTIONS

277292 Calculate the quantity of $\mathrm{CO}_{2}$ required to prepare $1 \mathrm{~L}$ of soda water when the soda water was packed under $2 \mathrm{~atm}$ of $\mathrm{CO}_{2}$.
[Henry's law constant for $\mathrm{CO}_{2}$ is $1.67 \times 10^{8} \mathrm{~Pa}$ ]

1 $5.98 \mathrm{~g}$
2 $1.21 \mathrm{~g}$
3 $2.9 \mathrm{~g}$
4 $67.1 \mathrm{~g}$
SOLUTIONS

277293 The Henry's law constant for the solubility of $\mathrm{N}_{2}$ gas in water at $298 \mathrm{~K}$ is $1 \times 10^{+5} \mathrm{~atm}$. The mole fraction of air is 0.8 . The number of moles of $\mathrm{N}_{2}$ from air dissolved in 10 mole of water at $298 \mathrm{~K}$ and $5 \mathrm{~atm}$ pressure is

1 $4 \times 10^{-5}$
2 $4 \times 10^{-4}$
3 $5 \times 10^{-4}$
4 $4 \times 10^{-6}$
SOLUTIONS

277294 Henry's law is valid for

1 $\mathrm{A}$ and $\mathrm{B}$
2 $\mathrm{B}$ and $\mathrm{C}$
3 $\mathrm{C}$ and $\mathrm{D}$
4 B and D
SOLUTIONS

277295 The vapour pressure of two liquids $X$ and $Y$ are 80 and 60 Torr respectively. The vapour pressure of the ideal solution obtained by mixing 3 moles of $X$ and 2 moles of $Y$ would be

1 68 Torr
2 140 Torr
3 48 Torr
4 72 Torr
5 54 Torr
SOLUTIONS

277292 Calculate the quantity of $\mathrm{CO}_{2}$ required to prepare $1 \mathrm{~L}$ of soda water when the soda water was packed under $2 \mathrm{~atm}$ of $\mathrm{CO}_{2}$.
[Henry's law constant for $\mathrm{CO}_{2}$ is $1.67 \times 10^{8} \mathrm{~Pa}$ ]

1 $5.98 \mathrm{~g}$
2 $1.21 \mathrm{~g}$
3 $2.9 \mathrm{~g}$
4 $67.1 \mathrm{~g}$
SOLUTIONS

277293 The Henry's law constant for the solubility of $\mathrm{N}_{2}$ gas in water at $298 \mathrm{~K}$ is $1 \times 10^{+5} \mathrm{~atm}$. The mole fraction of air is 0.8 . The number of moles of $\mathrm{N}_{2}$ from air dissolved in 10 mole of water at $298 \mathrm{~K}$ and $5 \mathrm{~atm}$ pressure is

1 $4 \times 10^{-5}$
2 $4 \times 10^{-4}$
3 $5 \times 10^{-4}$
4 $4 \times 10^{-6}$
SOLUTIONS

277294 Henry's law is valid for

1 $\mathrm{A}$ and $\mathrm{B}$
2 $\mathrm{B}$ and $\mathrm{C}$
3 $\mathrm{C}$ and $\mathrm{D}$
4 B and D
SOLUTIONS

277295 The vapour pressure of two liquids $X$ and $Y$ are 80 and 60 Torr respectively. The vapour pressure of the ideal solution obtained by mixing 3 moles of $X$ and 2 moles of $Y$ would be

1 68 Torr
2 140 Torr
3 48 Torr
4 72 Torr
5 54 Torr
SOLUTIONS

277292 Calculate the quantity of $\mathrm{CO}_{2}$ required to prepare $1 \mathrm{~L}$ of soda water when the soda water was packed under $2 \mathrm{~atm}$ of $\mathrm{CO}_{2}$.
[Henry's law constant for $\mathrm{CO}_{2}$ is $1.67 \times 10^{8} \mathrm{~Pa}$ ]

1 $5.98 \mathrm{~g}$
2 $1.21 \mathrm{~g}$
3 $2.9 \mathrm{~g}$
4 $67.1 \mathrm{~g}$
SOLUTIONS

277293 The Henry's law constant for the solubility of $\mathrm{N}_{2}$ gas in water at $298 \mathrm{~K}$ is $1 \times 10^{+5} \mathrm{~atm}$. The mole fraction of air is 0.8 . The number of moles of $\mathrm{N}_{2}$ from air dissolved in 10 mole of water at $298 \mathrm{~K}$ and $5 \mathrm{~atm}$ pressure is

1 $4 \times 10^{-5}$
2 $4 \times 10^{-4}$
3 $5 \times 10^{-4}$
4 $4 \times 10^{-6}$
SOLUTIONS

277294 Henry's law is valid for

1 $\mathrm{A}$ and $\mathrm{B}$
2 $\mathrm{B}$ and $\mathrm{C}$
3 $\mathrm{C}$ and $\mathrm{D}$
4 B and D
SOLUTIONS

277295 The vapour pressure of two liquids $X$ and $Y$ are 80 and 60 Torr respectively. The vapour pressure of the ideal solution obtained by mixing 3 moles of $X$ and 2 moles of $Y$ would be

1 68 Torr
2 140 Torr
3 48 Torr
4 72 Torr
5 54 Torr
SOLUTIONS

277292 Calculate the quantity of $\mathrm{CO}_{2}$ required to prepare $1 \mathrm{~L}$ of soda water when the soda water was packed under $2 \mathrm{~atm}$ of $\mathrm{CO}_{2}$.
[Henry's law constant for $\mathrm{CO}_{2}$ is $1.67 \times 10^{8} \mathrm{~Pa}$ ]

1 $5.98 \mathrm{~g}$
2 $1.21 \mathrm{~g}$
3 $2.9 \mathrm{~g}$
4 $67.1 \mathrm{~g}$
SOLUTIONS

277293 The Henry's law constant for the solubility of $\mathrm{N}_{2}$ gas in water at $298 \mathrm{~K}$ is $1 \times 10^{+5} \mathrm{~atm}$. The mole fraction of air is 0.8 . The number of moles of $\mathrm{N}_{2}$ from air dissolved in 10 mole of water at $298 \mathrm{~K}$ and $5 \mathrm{~atm}$ pressure is

1 $4 \times 10^{-5}$
2 $4 \times 10^{-4}$
3 $5 \times 10^{-4}$
4 $4 \times 10^{-6}$
SOLUTIONS

277294 Henry's law is valid for

1 $\mathrm{A}$ and $\mathrm{B}$
2 $\mathrm{B}$ and $\mathrm{C}$
3 $\mathrm{C}$ and $\mathrm{D}$
4 B and D
SOLUTIONS

277295 The vapour pressure of two liquids $X$ and $Y$ are 80 and 60 Torr respectively. The vapour pressure of the ideal solution obtained by mixing 3 moles of $X$ and 2 moles of $Y$ would be

1 68 Torr
2 140 Torr
3 48 Torr
4 72 Torr
5 54 Torr