Abnormal Molar Masses and Van't Hoff Factor
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CHXII02:SOLUTIONS

318973 Assertion :
Observed molecular mass of \({\rm{CaC}}{{\rm{l}}_{\rm{2}}}\) determined by any colligative property is less than ideal molecular mass.
Reason :
\({\rm{CaC}}{{\rm{l}}_{\rm{2}}}\) gets ionised in water as it is a strong electrolyte.

1 If both Assertion & Reason are true and reason is the correct explanation of the assertion.
2 If both Assertion & Reason are true but reason is not the correct explanation of the assertion.
3 If Assertion is true but Reason is false.
4 If Assertion is false but Reason is true.
CHXII02:SOLUTIONS

318974 Relationship between van’t Hoff’s factor (i) and degree of dissociation \(\left( {\rm{\alpha }} \right)\) is

1 \({\rm{i = }}\frac{{{\rm{\alpha - 1}}}}{{{\rm{n - 1}}}}\)
2 \({\rm{i = }}\frac{{{\rm{\alpha - 1}}}}{{{\rm{1 - n}}}}\)
3 \({\rm{\alpha = }}\frac{{{\rm{1 - i}}}}{{{\rm{n - 1}}}}\)
4 \({\rm{\alpha = }}\frac{{{\rm{i - 1}}}}{{{\rm{n - 1}}}}\)
MHTCET - 2019
CHXII02:SOLUTIONS

318975 A solute ‘S’ undergoes a reversible trimerization when dissolved in a certain solvent. The boiling point elevation of its 0.1 molal solution was found to be identical to the boiling point elevation in case of a 0.08 molal solution of a solute which neither undergoes association nor dissociation. To what percent had the solute ‘S’ undergone trimerization?

1 \(30\% \)
2 \(40\% \)
3 \(50\% \)
4 \(60\% \)
CHXII02:SOLUTIONS

318976 Which of the following has been arranged in the order of decreasing freezing point?

1 \({\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\,\,{\rm{KN}}{{\rm{O}}_{\rm{3}}} > {\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\)
\({\rm{CaC}}{{\rm{l}}_{\rm{2}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sugar}} > {\rm{0}}.{\rm{075}}{\mkern 1mu} {\rm{M}}\,\,{\rm{CuS}}{{\rm{O}}_{\rm{4}}}\)
2 \({\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\,\,{\rm{BaC}}{{\rm{l}}_{\rm{2}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sucrose}} > {\rm{0}}.{\rm{075}}{\mkern 1mu} {\rm{M}}\)
\({\rm{CuS}}{{\rm{O}}_{\rm{4}}} > {\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\,\,{\rm{KN}}{{\rm{O}}_{\rm{3}}}\)
3 \({\rm{0}}.{\rm{075M}}\,\,{\rm{CuS}}{{\rm{O}}_{\rm{4}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sucrose}} > {\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\)
\({\rm{BaC}}{{\rm{l}}_{\rm{2}}} > {\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\,\,{\rm{KN}}{{\rm{O}}_{\rm{3}}}\)
4 \({\rm{0}}.{\rm{075}}{\mkern 1mu} {\rm{M}}\,\,{\rm{CuS}}{{\rm{O}}_{\rm{4}}} > {\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\)
\({\rm{NaN}}{{\rm{O}}_{\rm{3}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sucrose}} > {\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\,\,{\rm{BaC}}{{\rm{l}}_{\rm{2}}}\)
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CHXII02:SOLUTIONS

318973 Assertion :
Observed molecular mass of \({\rm{CaC}}{{\rm{l}}_{\rm{2}}}\) determined by any colligative property is less than ideal molecular mass.
Reason :
\({\rm{CaC}}{{\rm{l}}_{\rm{2}}}\) gets ionised in water as it is a strong electrolyte.

1 If both Assertion & Reason are true and reason is the correct explanation of the assertion.
2 If both Assertion & Reason are true but reason is not the correct explanation of the assertion.
3 If Assertion is true but Reason is false.
4 If Assertion is false but Reason is true.
CHXII02:SOLUTIONS

318974 Relationship between van’t Hoff’s factor (i) and degree of dissociation \(\left( {\rm{\alpha }} \right)\) is

1 \({\rm{i = }}\frac{{{\rm{\alpha - 1}}}}{{{\rm{n - 1}}}}\)
2 \({\rm{i = }}\frac{{{\rm{\alpha - 1}}}}{{{\rm{1 - n}}}}\)
3 \({\rm{\alpha = }}\frac{{{\rm{1 - i}}}}{{{\rm{n - 1}}}}\)
4 \({\rm{\alpha = }}\frac{{{\rm{i - 1}}}}{{{\rm{n - 1}}}}\)
MHTCET - 2019
CHXII02:SOLUTIONS

318975 A solute ‘S’ undergoes a reversible trimerization when dissolved in a certain solvent. The boiling point elevation of its 0.1 molal solution was found to be identical to the boiling point elevation in case of a 0.08 molal solution of a solute which neither undergoes association nor dissociation. To what percent had the solute ‘S’ undergone trimerization?

1 \(30\% \)
2 \(40\% \)
3 \(50\% \)
4 \(60\% \)
CHXII02:SOLUTIONS

318976 Which of the following has been arranged in the order of decreasing freezing point?

1 \({\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\,\,{\rm{KN}}{{\rm{O}}_{\rm{3}}} > {\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\)
\({\rm{CaC}}{{\rm{l}}_{\rm{2}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sugar}} > {\rm{0}}.{\rm{075}}{\mkern 1mu} {\rm{M}}\,\,{\rm{CuS}}{{\rm{O}}_{\rm{4}}}\)
2 \({\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\,\,{\rm{BaC}}{{\rm{l}}_{\rm{2}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sucrose}} > {\rm{0}}.{\rm{075}}{\mkern 1mu} {\rm{M}}\)
\({\rm{CuS}}{{\rm{O}}_{\rm{4}}} > {\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\,\,{\rm{KN}}{{\rm{O}}_{\rm{3}}}\)
3 \({\rm{0}}.{\rm{075M}}\,\,{\rm{CuS}}{{\rm{O}}_{\rm{4}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sucrose}} > {\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\)
\({\rm{BaC}}{{\rm{l}}_{\rm{2}}} > {\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\,\,{\rm{KN}}{{\rm{O}}_{\rm{3}}}\)
4 \({\rm{0}}.{\rm{075}}{\mkern 1mu} {\rm{M}}\,\,{\rm{CuS}}{{\rm{O}}_{\rm{4}}} > {\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\)
\({\rm{NaN}}{{\rm{O}}_{\rm{3}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sucrose}} > {\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\,\,{\rm{BaC}}{{\rm{l}}_{\rm{2}}}\)
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CHXII02:SOLUTIONS

318973 Assertion :
Observed molecular mass of \({\rm{CaC}}{{\rm{l}}_{\rm{2}}}\) determined by any colligative property is less than ideal molecular mass.
Reason :
\({\rm{CaC}}{{\rm{l}}_{\rm{2}}}\) gets ionised in water as it is a strong electrolyte.

1 If both Assertion & Reason are true and reason is the correct explanation of the assertion.
2 If both Assertion & Reason are true but reason is not the correct explanation of the assertion.
3 If Assertion is true but Reason is false.
4 If Assertion is false but Reason is true.
CHXII02:SOLUTIONS

318974 Relationship between van’t Hoff’s factor (i) and degree of dissociation \(\left( {\rm{\alpha }} \right)\) is

1 \({\rm{i = }}\frac{{{\rm{\alpha - 1}}}}{{{\rm{n - 1}}}}\)
2 \({\rm{i = }}\frac{{{\rm{\alpha - 1}}}}{{{\rm{1 - n}}}}\)
3 \({\rm{\alpha = }}\frac{{{\rm{1 - i}}}}{{{\rm{n - 1}}}}\)
4 \({\rm{\alpha = }}\frac{{{\rm{i - 1}}}}{{{\rm{n - 1}}}}\)
MHTCET - 2019
CHXII02:SOLUTIONS

318975 A solute ‘S’ undergoes a reversible trimerization when dissolved in a certain solvent. The boiling point elevation of its 0.1 molal solution was found to be identical to the boiling point elevation in case of a 0.08 molal solution of a solute which neither undergoes association nor dissociation. To what percent had the solute ‘S’ undergone trimerization?

1 \(30\% \)
2 \(40\% \)
3 \(50\% \)
4 \(60\% \)
CHXII02:SOLUTIONS

318976 Which of the following has been arranged in the order of decreasing freezing point?

1 \({\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\,\,{\rm{KN}}{{\rm{O}}_{\rm{3}}} > {\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\)
\({\rm{CaC}}{{\rm{l}}_{\rm{2}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sugar}} > {\rm{0}}.{\rm{075}}{\mkern 1mu} {\rm{M}}\,\,{\rm{CuS}}{{\rm{O}}_{\rm{4}}}\)
2 \({\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\,\,{\rm{BaC}}{{\rm{l}}_{\rm{2}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sucrose}} > {\rm{0}}.{\rm{075}}{\mkern 1mu} {\rm{M}}\)
\({\rm{CuS}}{{\rm{O}}_{\rm{4}}} > {\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\,\,{\rm{KN}}{{\rm{O}}_{\rm{3}}}\)
3 \({\rm{0}}.{\rm{075M}}\,\,{\rm{CuS}}{{\rm{O}}_{\rm{4}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sucrose}} > {\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\)
\({\rm{BaC}}{{\rm{l}}_{\rm{2}}} > {\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\,\,{\rm{KN}}{{\rm{O}}_{\rm{3}}}\)
4 \({\rm{0}}.{\rm{075}}{\mkern 1mu} {\rm{M}}\,\,{\rm{CuS}}{{\rm{O}}_{\rm{4}}} > {\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\)
\({\rm{NaN}}{{\rm{O}}_{\rm{3}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sucrose}} > {\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\,\,{\rm{BaC}}{{\rm{l}}_{\rm{2}}}\)
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CHXII02:SOLUTIONS

318973 Assertion :
Observed molecular mass of \({\rm{CaC}}{{\rm{l}}_{\rm{2}}}\) determined by any colligative property is less than ideal molecular mass.
Reason :
\({\rm{CaC}}{{\rm{l}}_{\rm{2}}}\) gets ionised in water as it is a strong electrolyte.

1 If both Assertion & Reason are true and reason is the correct explanation of the assertion.
2 If both Assertion & Reason are true but reason is not the correct explanation of the assertion.
3 If Assertion is true but Reason is false.
4 If Assertion is false but Reason is true.
CHXII02:SOLUTIONS

318974 Relationship between van’t Hoff’s factor (i) and degree of dissociation \(\left( {\rm{\alpha }} \right)\) is

1 \({\rm{i = }}\frac{{{\rm{\alpha - 1}}}}{{{\rm{n - 1}}}}\)
2 \({\rm{i = }}\frac{{{\rm{\alpha - 1}}}}{{{\rm{1 - n}}}}\)
3 \({\rm{\alpha = }}\frac{{{\rm{1 - i}}}}{{{\rm{n - 1}}}}\)
4 \({\rm{\alpha = }}\frac{{{\rm{i - 1}}}}{{{\rm{n - 1}}}}\)
MHTCET - 2019
CHXII02:SOLUTIONS

318975 A solute ‘S’ undergoes a reversible trimerization when dissolved in a certain solvent. The boiling point elevation of its 0.1 molal solution was found to be identical to the boiling point elevation in case of a 0.08 molal solution of a solute which neither undergoes association nor dissociation. To what percent had the solute ‘S’ undergone trimerization?

1 \(30\% \)
2 \(40\% \)
3 \(50\% \)
4 \(60\% \)
CHXII02:SOLUTIONS

318976 Which of the following has been arranged in the order of decreasing freezing point?

1 \({\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\,\,{\rm{KN}}{{\rm{O}}_{\rm{3}}} > {\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\)
\({\rm{CaC}}{{\rm{l}}_{\rm{2}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sugar}} > {\rm{0}}.{\rm{075}}{\mkern 1mu} {\rm{M}}\,\,{\rm{CuS}}{{\rm{O}}_{\rm{4}}}\)
2 \({\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\,\,{\rm{BaC}}{{\rm{l}}_{\rm{2}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sucrose}} > {\rm{0}}.{\rm{075}}{\mkern 1mu} {\rm{M}}\)
\({\rm{CuS}}{{\rm{O}}_{\rm{4}}} > {\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\,\,{\rm{KN}}{{\rm{O}}_{\rm{3}}}\)
3 \({\rm{0}}.{\rm{075M}}\,\,{\rm{CuS}}{{\rm{O}}_{\rm{4}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sucrose}} > {\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\)
\({\rm{BaC}}{{\rm{l}}_{\rm{2}}} > {\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\,\,{\rm{KN}}{{\rm{O}}_{\rm{3}}}\)
4 \({\rm{0}}.{\rm{075}}{\mkern 1mu} {\rm{M}}\,\,{\rm{CuS}}{{\rm{O}}_{\rm{4}}} > {\rm{0}}.{\rm{05}}{\mkern 1mu} {\rm{M}}\)
\({\rm{NaN}}{{\rm{O}}_{\rm{3}}} > {\rm{0}}.{\rm{140}}{\mkern 1mu} {\rm{M}}\)
\({\rm{sucrose}} > {\rm{0}}.{\rm{04}}{\mkern 1mu} {\rm{M}}\,\,{\rm{BaC}}{{\rm{l}}_{\rm{2}}}\)
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