Vapour Pressure of Liquid Solutions
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CHXII02:SOLUTIONS

319514 Which one of the following statements regarding Henry’s law is not correct?

1 Different gases have different \({{\rm{K}}_{\rm{H}}}\)
(Henry’s law constant) values at the same
temperature.
2 The value of \({{\rm{K}}_{\rm{H}}}\) increases with increase of temperature and \({K_H}\) is function of the nature of the gas.
3 The partial pressure of the gas in vapour phase is proportional to the mole fraction of the gas in the solution.
4 Higher the value of \({{\rm{K}}_{\rm{H}}}\) at a given pressure, higher is the solubility of the gas in the liquids.
JEE - 2019
CHXII02:SOLUTIONS

319515 Two liquids having vapour pressures \({\rm{P}}_{\rm{1}}^{\rm{o}}\,\,{\rm{and}}\,\,{\rm{P}}_{\rm{2}}^{\rm{o}}\) in pure state in the ratio of 2 : 1 are mixed in the molar ratio of 1 : 2. The ratio of their moles in the vapour state would be

1 \(1:1\)
2 \(1:2\)
3 \(2:1\)
4 \(3:2\)
CHXII02:SOLUTIONS

319516 The mole fraction of toluene in the vapour phase which is in equilibrium with a solution of benzene ( \({\mathrm{P_{\mathrm{B}}{ }^{\circ}=120}}\) torr) and toluene ( \({\mathrm{P_{\mathrm{T}}{ }^{\circ}=80}}\) torr) having 2.0 mol of each, is ____ .

1 0.1
2 0.6
3 0.5
4 0.4
CHXII02:SOLUTIONS

319517 A solution has a \({\rm{1:4}}\) mole ratio of pentane to hexane. The vapour pressures of pure hydrocarbons at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\) are 440 mmHg for pentane and 120 mmHg for hexane. The mole fraction of pentane in vapour phase would be

1 0.549
2 \({\rm{0}}{\rm{.200}}\)
3 0.786
4 0.478
NEET DIGITAL LIBRARY
CHXII02:SOLUTIONS

319514 Which one of the following statements regarding Henry’s law is not correct?

1 Different gases have different \({{\rm{K}}_{\rm{H}}}\)
(Henry’s law constant) values at the same
temperature.
2 The value of \({{\rm{K}}_{\rm{H}}}\) increases with increase of temperature and \({K_H}\) is function of the nature of the gas.
3 The partial pressure of the gas in vapour phase is proportional to the mole fraction of the gas in the solution.
4 Higher the value of \({{\rm{K}}_{\rm{H}}}\) at a given pressure, higher is the solubility of the gas in the liquids.
JEE - 2019
CHXII02:SOLUTIONS

319515 Two liquids having vapour pressures \({\rm{P}}_{\rm{1}}^{\rm{o}}\,\,{\rm{and}}\,\,{\rm{P}}_{\rm{2}}^{\rm{o}}\) in pure state in the ratio of 2 : 1 are mixed in the molar ratio of 1 : 2. The ratio of their moles in the vapour state would be

1 \(1:1\)
2 \(1:2\)
3 \(2:1\)
4 \(3:2\)
CHXII02:SOLUTIONS

319516 The mole fraction of toluene in the vapour phase which is in equilibrium with a solution of benzene ( \({\mathrm{P_{\mathrm{B}}{ }^{\circ}=120}}\) torr) and toluene ( \({\mathrm{P_{\mathrm{T}}{ }^{\circ}=80}}\) torr) having 2.0 mol of each, is ____ .

1 0.1
2 0.6
3 0.5
4 0.4
CHXII02:SOLUTIONS

319517 A solution has a \({\rm{1:4}}\) mole ratio of pentane to hexane. The vapour pressures of pure hydrocarbons at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\) are 440 mmHg for pentane and 120 mmHg for hexane. The mole fraction of pentane in vapour phase would be

1 0.549
2 \({\rm{0}}{\rm{.200}}\)
3 0.786
4 0.478
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CHXII02:SOLUTIONS

319514 Which one of the following statements regarding Henry’s law is not correct?

1 Different gases have different \({{\rm{K}}_{\rm{H}}}\)
(Henry’s law constant) values at the same
temperature.
2 The value of \({{\rm{K}}_{\rm{H}}}\) increases with increase of temperature and \({K_H}\) is function of the nature of the gas.
3 The partial pressure of the gas in vapour phase is proportional to the mole fraction of the gas in the solution.
4 Higher the value of \({{\rm{K}}_{\rm{H}}}\) at a given pressure, higher is the solubility of the gas in the liquids.
JEE - 2019
CHXII02:SOLUTIONS

319515 Two liquids having vapour pressures \({\rm{P}}_{\rm{1}}^{\rm{o}}\,\,{\rm{and}}\,\,{\rm{P}}_{\rm{2}}^{\rm{o}}\) in pure state in the ratio of 2 : 1 are mixed in the molar ratio of 1 : 2. The ratio of their moles in the vapour state would be

1 \(1:1\)
2 \(1:2\)
3 \(2:1\)
4 \(3:2\)
CHXII02:SOLUTIONS

319516 The mole fraction of toluene in the vapour phase which is in equilibrium with a solution of benzene ( \({\mathrm{P_{\mathrm{B}}{ }^{\circ}=120}}\) torr) and toluene ( \({\mathrm{P_{\mathrm{T}}{ }^{\circ}=80}}\) torr) having 2.0 mol of each, is ____ .

1 0.1
2 0.6
3 0.5
4 0.4
CHXII02:SOLUTIONS

319517 A solution has a \({\rm{1:4}}\) mole ratio of pentane to hexane. The vapour pressures of pure hydrocarbons at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\) are 440 mmHg for pentane and 120 mmHg for hexane. The mole fraction of pentane in vapour phase would be

1 0.549
2 \({\rm{0}}{\rm{.200}}\)
3 0.786
4 0.478
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CHXII02:SOLUTIONS

319514 Which one of the following statements regarding Henry’s law is not correct?

1 Different gases have different \({{\rm{K}}_{\rm{H}}}\)
(Henry’s law constant) values at the same
temperature.
2 The value of \({{\rm{K}}_{\rm{H}}}\) increases with increase of temperature and \({K_H}\) is function of the nature of the gas.
3 The partial pressure of the gas in vapour phase is proportional to the mole fraction of the gas in the solution.
4 Higher the value of \({{\rm{K}}_{\rm{H}}}\) at a given pressure, higher is the solubility of the gas in the liquids.
JEE - 2019
CHXII02:SOLUTIONS

319515 Two liquids having vapour pressures \({\rm{P}}_{\rm{1}}^{\rm{o}}\,\,{\rm{and}}\,\,{\rm{P}}_{\rm{2}}^{\rm{o}}\) in pure state in the ratio of 2 : 1 are mixed in the molar ratio of 1 : 2. The ratio of their moles in the vapour state would be

1 \(1:1\)
2 \(1:2\)
3 \(2:1\)
4 \(3:2\)
CHXII02:SOLUTIONS

319516 The mole fraction of toluene in the vapour phase which is in equilibrium with a solution of benzene ( \({\mathrm{P_{\mathrm{B}}{ }^{\circ}=120}}\) torr) and toluene ( \({\mathrm{P_{\mathrm{T}}{ }^{\circ}=80}}\) torr) having 2.0 mol of each, is ____ .

1 0.1
2 0.6
3 0.5
4 0.4
CHXII02:SOLUTIONS

319517 A solution has a \({\rm{1:4}}\) mole ratio of pentane to hexane. The vapour pressures of pure hydrocarbons at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\) are 440 mmHg for pentane and 120 mmHg for hexane. The mole fraction of pentane in vapour phase would be

1 0.549
2 \({\rm{0}}{\rm{.200}}\)
3 0.786
4 0.478
NEET DIGITAL LIBRARY