Relative Lowering of Vapour Pressure
CHXII02:SOLUTIONS

319351 What is vapour pressure of a solution when 2 mol of a non - volatile solute is dissolved in \(20 \mathrm{~mol}\) of water? \(\left( {{\text{P}}{^\circ _1} = 32 {\text{mm Hg}}} \right)\)

1 \(29.1 {\text{mm Hg}}\)
2 \(12 {\text{mm Hg}}\)
3 \(16 {\text{mm Hg}}\)
4 \(9 {\text{mm Hg}}\)
CHXII02:SOLUTIONS

319352 3 g of urea is dossolved in 45 g of \({{\rm{H}}_{\rm{2}}}{\rm{O}}\). The relative lowering in vapour pressure is

1 0.05
2 0.04
3 0.02
4 0.01
CHXII02:SOLUTIONS

319353 The vapour pressure of solvent decreases by 10 mm Hg, if mole fraction of non-volatile solute is 0.2. Calculate vapour pressure of solvent.

1 70 mm of Hg
2 40 mm of Hg
3 50 mm of Hg
4 60 mm of Hg
CHXII02:SOLUTIONS

319354 The vapour pressure of methanol at certain temperature is 1 atm. By adding a small amount of ethyl acetate the vapour pressure of the solution is found to be 684 mm. The relative lowering of vapour pressure is

1 0.1
2 0.9
3 76
4 0.694
CHXII02:SOLUTIONS

319355 The vapour pressure of acetone at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\) is 185 torr. When 1.2 g of a non-volatile substances was dissolved in 100 g of acetone at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\), its vapour pressure was 183 torr. The molar mass \(\left( {{\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\) of the substance is:

1 128
2 32
3 488
4 64
CHXII02:SOLUTIONS

319351 What is vapour pressure of a solution when 2 mol of a non - volatile solute is dissolved in \(20 \mathrm{~mol}\) of water? \(\left( {{\text{P}}{^\circ _1} = 32 {\text{mm Hg}}} \right)\)

1 \(29.1 {\text{mm Hg}}\)
2 \(12 {\text{mm Hg}}\)
3 \(16 {\text{mm Hg}}\)
4 \(9 {\text{mm Hg}}\)
CHXII02:SOLUTIONS

319352 3 g of urea is dossolved in 45 g of \({{\rm{H}}_{\rm{2}}}{\rm{O}}\). The relative lowering in vapour pressure is

1 0.05
2 0.04
3 0.02
4 0.01
CHXII02:SOLUTIONS

319353 The vapour pressure of solvent decreases by 10 mm Hg, if mole fraction of non-volatile solute is 0.2. Calculate vapour pressure of solvent.

1 70 mm of Hg
2 40 mm of Hg
3 50 mm of Hg
4 60 mm of Hg
CHXII02:SOLUTIONS

319354 The vapour pressure of methanol at certain temperature is 1 atm. By adding a small amount of ethyl acetate the vapour pressure of the solution is found to be 684 mm. The relative lowering of vapour pressure is

1 0.1
2 0.9
3 76
4 0.694
CHXII02:SOLUTIONS

319355 The vapour pressure of acetone at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\) is 185 torr. When 1.2 g of a non-volatile substances was dissolved in 100 g of acetone at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\), its vapour pressure was 183 torr. The molar mass \(\left( {{\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\) of the substance is:

1 128
2 32
3 488
4 64
CHXII02:SOLUTIONS

319351 What is vapour pressure of a solution when 2 mol of a non - volatile solute is dissolved in \(20 \mathrm{~mol}\) of water? \(\left( {{\text{P}}{^\circ _1} = 32 {\text{mm Hg}}} \right)\)

1 \(29.1 {\text{mm Hg}}\)
2 \(12 {\text{mm Hg}}\)
3 \(16 {\text{mm Hg}}\)
4 \(9 {\text{mm Hg}}\)
CHXII02:SOLUTIONS

319352 3 g of urea is dossolved in 45 g of \({{\rm{H}}_{\rm{2}}}{\rm{O}}\). The relative lowering in vapour pressure is

1 0.05
2 0.04
3 0.02
4 0.01
CHXII02:SOLUTIONS

319353 The vapour pressure of solvent decreases by 10 mm Hg, if mole fraction of non-volatile solute is 0.2. Calculate vapour pressure of solvent.

1 70 mm of Hg
2 40 mm of Hg
3 50 mm of Hg
4 60 mm of Hg
CHXII02:SOLUTIONS

319354 The vapour pressure of methanol at certain temperature is 1 atm. By adding a small amount of ethyl acetate the vapour pressure of the solution is found to be 684 mm. The relative lowering of vapour pressure is

1 0.1
2 0.9
3 76
4 0.694
CHXII02:SOLUTIONS

319355 The vapour pressure of acetone at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\) is 185 torr. When 1.2 g of a non-volatile substances was dissolved in 100 g of acetone at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\), its vapour pressure was 183 torr. The molar mass \(\left( {{\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\) of the substance is:

1 128
2 32
3 488
4 64
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHXII02:SOLUTIONS

319351 What is vapour pressure of a solution when 2 mol of a non - volatile solute is dissolved in \(20 \mathrm{~mol}\) of water? \(\left( {{\text{P}}{^\circ _1} = 32 {\text{mm Hg}}} \right)\)

1 \(29.1 {\text{mm Hg}}\)
2 \(12 {\text{mm Hg}}\)
3 \(16 {\text{mm Hg}}\)
4 \(9 {\text{mm Hg}}\)
CHXII02:SOLUTIONS

319352 3 g of urea is dossolved in 45 g of \({{\rm{H}}_{\rm{2}}}{\rm{O}}\). The relative lowering in vapour pressure is

1 0.05
2 0.04
3 0.02
4 0.01
CHXII02:SOLUTIONS

319353 The vapour pressure of solvent decreases by 10 mm Hg, if mole fraction of non-volatile solute is 0.2. Calculate vapour pressure of solvent.

1 70 mm of Hg
2 40 mm of Hg
3 50 mm of Hg
4 60 mm of Hg
CHXII02:SOLUTIONS

319354 The vapour pressure of methanol at certain temperature is 1 atm. By adding a small amount of ethyl acetate the vapour pressure of the solution is found to be 684 mm. The relative lowering of vapour pressure is

1 0.1
2 0.9
3 76
4 0.694
CHXII02:SOLUTIONS

319355 The vapour pressure of acetone at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\) is 185 torr. When 1.2 g of a non-volatile substances was dissolved in 100 g of acetone at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\), its vapour pressure was 183 torr. The molar mass \(\left( {{\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\) of the substance is:

1 128
2 32
3 488
4 64
CHXII02:SOLUTIONS

319351 What is vapour pressure of a solution when 2 mol of a non - volatile solute is dissolved in \(20 \mathrm{~mol}\) of water? \(\left( {{\text{P}}{^\circ _1} = 32 {\text{mm Hg}}} \right)\)

1 \(29.1 {\text{mm Hg}}\)
2 \(12 {\text{mm Hg}}\)
3 \(16 {\text{mm Hg}}\)
4 \(9 {\text{mm Hg}}\)
CHXII02:SOLUTIONS

319352 3 g of urea is dossolved in 45 g of \({{\rm{H}}_{\rm{2}}}{\rm{O}}\). The relative lowering in vapour pressure is

1 0.05
2 0.04
3 0.02
4 0.01
CHXII02:SOLUTIONS

319353 The vapour pressure of solvent decreases by 10 mm Hg, if mole fraction of non-volatile solute is 0.2. Calculate vapour pressure of solvent.

1 70 mm of Hg
2 40 mm of Hg
3 50 mm of Hg
4 60 mm of Hg
CHXII02:SOLUTIONS

319354 The vapour pressure of methanol at certain temperature is 1 atm. By adding a small amount of ethyl acetate the vapour pressure of the solution is found to be 684 mm. The relative lowering of vapour pressure is

1 0.1
2 0.9
3 76
4 0.694
CHXII02:SOLUTIONS

319355 The vapour pressure of acetone at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\) is 185 torr. When 1.2 g of a non-volatile substances was dissolved in 100 g of acetone at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\), its vapour pressure was 183 torr. The molar mass \(\left( {{\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\) of the substance is:

1 128
2 32
3 488
4 64