Relative Lowering of Vapour Pressure
CHXII02:SOLUTIONS

319330 Three solutions are prepared by adding ‘w’ gram of ‘A’ into 1 kg of water, ‘w’ gram of ‘B’ into another 1 kg of water and ‘w’ gram of ‘C’ in another 1 kg of water (A, B, C are non electrolyte). Dry air is passed from these solutions in sequence \(\left( {A \to B \to C} \right)\). The loss in weight of solution A was found to be 2g, while solution B gained 0.5 g and solution C lost 1 g. Then the relation between molar masses of A, B and C are

1 \({{\rm{M}}_{\rm{A}}}{\rm{:}}{{\rm{M}}_{\rm{B}}}{\rm{:}}{{\rm{M}}_{\rm{C}}}{\rm{ = 4:3:5}}\)
2 \({{\rm{M}}_{\rm{A}}}{\rm{:}}{{\rm{M}}_{\rm{B}}}{\rm{:}}{{\rm{M}}_{\rm{C}}}{\rm{ = }}\frac{{\rm{1}}}{{\rm{4}}}{\rm{:}}\frac{{\rm{1}}}{{\rm{3}}}{\rm{:}}\frac{{\rm{1}}}{{\rm{5}}}\)
3 \({{\rm{M}}_{\rm{C}}}{\rm{ > }}{{\rm{M}}_{\rm{A}}}{\rm{ > }}{{\rm{M}}_{\rm{B}}}\)
4 \({{\rm{M}}_{\rm{B}}}{\rm{ > }}{{\rm{M}}_{\rm{A}}}{\rm{ > }}{{\rm{M}}_{\rm{C}}}\)
CHXII02:SOLUTIONS

319331 Statement A :
Lowering of vapour pressure depends only on the concentration of the solute particles.
Statement B :
RLVP, related to the concentration term mole fraction.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
CHXII02:SOLUTIONS

319332 The vapour pressure of a solution having solid as solute and liquid as solvent is

1 directly proportional to mole fraction of the solvent
2 inversely proportional to mole fraction of the solute
3 directly proportional to mole fraction of the solute
4 inversely proportional to mole fraction of the solute
CHXII02:SOLUTIONS

319333 Assertion :
If a liquid solute, more volatile than the solvent, is added to the solvent, the vapour pressure of the solution may increase i.e., \(\mathrm{p}_{\mathrm{s}}>\mathrm{p}^{\circ}\).
Reason :
In the presence of a more volatile liquid solute, only the solute will form the vapours and solvent will not.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII02:SOLUTIONS

319330 Three solutions are prepared by adding ‘w’ gram of ‘A’ into 1 kg of water, ‘w’ gram of ‘B’ into another 1 kg of water and ‘w’ gram of ‘C’ in another 1 kg of water (A, B, C are non electrolyte). Dry air is passed from these solutions in sequence \(\left( {A \to B \to C} \right)\). The loss in weight of solution A was found to be 2g, while solution B gained 0.5 g and solution C lost 1 g. Then the relation between molar masses of A, B and C are

1 \({{\rm{M}}_{\rm{A}}}{\rm{:}}{{\rm{M}}_{\rm{B}}}{\rm{:}}{{\rm{M}}_{\rm{C}}}{\rm{ = 4:3:5}}\)
2 \({{\rm{M}}_{\rm{A}}}{\rm{:}}{{\rm{M}}_{\rm{B}}}{\rm{:}}{{\rm{M}}_{\rm{C}}}{\rm{ = }}\frac{{\rm{1}}}{{\rm{4}}}{\rm{:}}\frac{{\rm{1}}}{{\rm{3}}}{\rm{:}}\frac{{\rm{1}}}{{\rm{5}}}\)
3 \({{\rm{M}}_{\rm{C}}}{\rm{ > }}{{\rm{M}}_{\rm{A}}}{\rm{ > }}{{\rm{M}}_{\rm{B}}}\)
4 \({{\rm{M}}_{\rm{B}}}{\rm{ > }}{{\rm{M}}_{\rm{A}}}{\rm{ > }}{{\rm{M}}_{\rm{C}}}\)
CHXII02:SOLUTIONS

319331 Statement A :
Lowering of vapour pressure depends only on the concentration of the solute particles.
Statement B :
RLVP, related to the concentration term mole fraction.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
CHXII02:SOLUTIONS

319332 The vapour pressure of a solution having solid as solute and liquid as solvent is

1 directly proportional to mole fraction of the solvent
2 inversely proportional to mole fraction of the solute
3 directly proportional to mole fraction of the solute
4 inversely proportional to mole fraction of the solute
CHXII02:SOLUTIONS

319333 Assertion :
If a liquid solute, more volatile than the solvent, is added to the solvent, the vapour pressure of the solution may increase i.e., \(\mathrm{p}_{\mathrm{s}}>\mathrm{p}^{\circ}\).
Reason :
In the presence of a more volatile liquid solute, only the solute will form the vapours and solvent will not.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII02:SOLUTIONS

319330 Three solutions are prepared by adding ‘w’ gram of ‘A’ into 1 kg of water, ‘w’ gram of ‘B’ into another 1 kg of water and ‘w’ gram of ‘C’ in another 1 kg of water (A, B, C are non electrolyte). Dry air is passed from these solutions in sequence \(\left( {A \to B \to C} \right)\). The loss in weight of solution A was found to be 2g, while solution B gained 0.5 g and solution C lost 1 g. Then the relation between molar masses of A, B and C are

1 \({{\rm{M}}_{\rm{A}}}{\rm{:}}{{\rm{M}}_{\rm{B}}}{\rm{:}}{{\rm{M}}_{\rm{C}}}{\rm{ = 4:3:5}}\)
2 \({{\rm{M}}_{\rm{A}}}{\rm{:}}{{\rm{M}}_{\rm{B}}}{\rm{:}}{{\rm{M}}_{\rm{C}}}{\rm{ = }}\frac{{\rm{1}}}{{\rm{4}}}{\rm{:}}\frac{{\rm{1}}}{{\rm{3}}}{\rm{:}}\frac{{\rm{1}}}{{\rm{5}}}\)
3 \({{\rm{M}}_{\rm{C}}}{\rm{ > }}{{\rm{M}}_{\rm{A}}}{\rm{ > }}{{\rm{M}}_{\rm{B}}}\)
4 \({{\rm{M}}_{\rm{B}}}{\rm{ > }}{{\rm{M}}_{\rm{A}}}{\rm{ > }}{{\rm{M}}_{\rm{C}}}\)
CHXII02:SOLUTIONS

319331 Statement A :
Lowering of vapour pressure depends only on the concentration of the solute particles.
Statement B :
RLVP, related to the concentration term mole fraction.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
CHXII02:SOLUTIONS

319332 The vapour pressure of a solution having solid as solute and liquid as solvent is

1 directly proportional to mole fraction of the solvent
2 inversely proportional to mole fraction of the solute
3 directly proportional to mole fraction of the solute
4 inversely proportional to mole fraction of the solute
CHXII02:SOLUTIONS

319333 Assertion :
If a liquid solute, more volatile than the solvent, is added to the solvent, the vapour pressure of the solution may increase i.e., \(\mathrm{p}_{\mathrm{s}}>\mathrm{p}^{\circ}\).
Reason :
In the presence of a more volatile liquid solute, only the solute will form the vapours and solvent will not.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHXII02:SOLUTIONS

319330 Three solutions are prepared by adding ‘w’ gram of ‘A’ into 1 kg of water, ‘w’ gram of ‘B’ into another 1 kg of water and ‘w’ gram of ‘C’ in another 1 kg of water (A, B, C are non electrolyte). Dry air is passed from these solutions in sequence \(\left( {A \to B \to C} \right)\). The loss in weight of solution A was found to be 2g, while solution B gained 0.5 g and solution C lost 1 g. Then the relation between molar masses of A, B and C are

1 \({{\rm{M}}_{\rm{A}}}{\rm{:}}{{\rm{M}}_{\rm{B}}}{\rm{:}}{{\rm{M}}_{\rm{C}}}{\rm{ = 4:3:5}}\)
2 \({{\rm{M}}_{\rm{A}}}{\rm{:}}{{\rm{M}}_{\rm{B}}}{\rm{:}}{{\rm{M}}_{\rm{C}}}{\rm{ = }}\frac{{\rm{1}}}{{\rm{4}}}{\rm{:}}\frac{{\rm{1}}}{{\rm{3}}}{\rm{:}}\frac{{\rm{1}}}{{\rm{5}}}\)
3 \({{\rm{M}}_{\rm{C}}}{\rm{ > }}{{\rm{M}}_{\rm{A}}}{\rm{ > }}{{\rm{M}}_{\rm{B}}}\)
4 \({{\rm{M}}_{\rm{B}}}{\rm{ > }}{{\rm{M}}_{\rm{A}}}{\rm{ > }}{{\rm{M}}_{\rm{C}}}\)
CHXII02:SOLUTIONS

319331 Statement A :
Lowering of vapour pressure depends only on the concentration of the solute particles.
Statement B :
RLVP, related to the concentration term mole fraction.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
CHXII02:SOLUTIONS

319332 The vapour pressure of a solution having solid as solute and liquid as solvent is

1 directly proportional to mole fraction of the solvent
2 inversely proportional to mole fraction of the solute
3 directly proportional to mole fraction of the solute
4 inversely proportional to mole fraction of the solute
CHXII02:SOLUTIONS

319333 Assertion :
If a liquid solute, more volatile than the solvent, is added to the solvent, the vapour pressure of the solution may increase i.e., \(\mathrm{p}_{\mathrm{s}}>\mathrm{p}^{\circ}\).
Reason :
In the presence of a more volatile liquid solute, only the solute will form the vapours and solvent will not.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.