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

319067 The freezing point of one molal \(\mathrm{NaCl}\) assuming \(\mathrm{NaCl}\) to be \(100 \%\) dissociated in water is (molal depression constant is 1.86 ).

1 \(-2.72^{\circ} \mathrm{C}\)
2 \(-3.72^{\circ} \mathrm{C}\)
3 \(2.72^{\circ} \mathrm{C}\)
4 \(3.72^{\circ} \mathrm{C}\)
CHXII02:SOLUTIONS

319068 \({\mathrm{\mathrm{K}_{2} \mathrm{HgI}_{4}}}\) is \({\mathrm{40 \%}}\) ionised in its aqueous solution. The value of its van't Hoff factor is ____ .

1 1.8
2 3
3 1.2
4 2
CHXII02:SOLUTIONS

319069 The degree of dissociation \({\rm{(\alpha )}}\) of a weak electrolyte, \({{\rm{A}}_{\rm{x}}}{{\rm{B}}_{\rm{y}}}\) is related to Van't Hoff factor (i) by the expression

1 \({\rm{\alpha }} = \frac{{{\rm{i}} + 1}}{{{\rm{x}} + {\rm{y}} - 1}}\)
2 \({\rm{\alpha }} = \frac{{{\rm{i}} - 1}}{{({\rm{x}} + {\rm{y}} - 1)}}\)
3 \({\rm{\alpha }} = \frac{{{\rm{x}} + {\rm{y}} - 1}}{{{\rm{i}} - 1}}\)
4 \({\rm{\alpha }} = \frac{{{\rm{x}}\,{\rm{ + }}\,{\rm{y}} + 1}}{{{\rm{i}} - 1}}\)
CHXII02:SOLUTIONS

319070 Match Column \({\text{I}}\) with Column \({\text{II}}\)
supporting img

Choose the correct answer from the options given below:

1 A - R, B - Q , C - P, D - S
2 A - P, B - R, C - Q , D - S
3 A - R, B - P, C - S, D - Q
4 A - R, B - P, C - Q , D - S
JEE - 2023
CHXII02:SOLUTIONS

319071 Assertion :
\(1 \mathrm{~mol} \mathrm{KCl}\) in one \(\mathrm{kg}\) of water increases the boiling point by \(2 \times 0.52 \mathrm{~K}\).
Reason :
\(1 \mathrm{~mol}\) of \(\mathrm{KCl}\) in water releases \(1 \mathrm{~mol}\) of \(\mathrm{K}^{+}\)and \(1 \mathrm{~mol}\) of \(\mathrm{Cl}^{-}\)ions.

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.
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CHXII02:SOLUTIONS

319067 The freezing point of one molal \(\mathrm{NaCl}\) assuming \(\mathrm{NaCl}\) to be \(100 \%\) dissociated in water is (molal depression constant is 1.86 ).

1 \(-2.72^{\circ} \mathrm{C}\)
2 \(-3.72^{\circ} \mathrm{C}\)
3 \(2.72^{\circ} \mathrm{C}\)
4 \(3.72^{\circ} \mathrm{C}\)
CHXII02:SOLUTIONS

319068 \({\mathrm{\mathrm{K}_{2} \mathrm{HgI}_{4}}}\) is \({\mathrm{40 \%}}\) ionised in its aqueous solution. The value of its van't Hoff factor is ____ .

1 1.8
2 3
3 1.2
4 2
CHXII02:SOLUTIONS

319069 The degree of dissociation \({\rm{(\alpha )}}\) of a weak electrolyte, \({{\rm{A}}_{\rm{x}}}{{\rm{B}}_{\rm{y}}}\) is related to Van't Hoff factor (i) by the expression

1 \({\rm{\alpha }} = \frac{{{\rm{i}} + 1}}{{{\rm{x}} + {\rm{y}} - 1}}\)
2 \({\rm{\alpha }} = \frac{{{\rm{i}} - 1}}{{({\rm{x}} + {\rm{y}} - 1)}}\)
3 \({\rm{\alpha }} = \frac{{{\rm{x}} + {\rm{y}} - 1}}{{{\rm{i}} - 1}}\)
4 \({\rm{\alpha }} = \frac{{{\rm{x}}\,{\rm{ + }}\,{\rm{y}} + 1}}{{{\rm{i}} - 1}}\)
CHXII02:SOLUTIONS

319070 Match Column \({\text{I}}\) with Column \({\text{II}}\)
supporting img

Choose the correct answer from the options given below:

1 A - R, B - Q , C - P, D - S
2 A - P, B - R, C - Q , D - S
3 A - R, B - P, C - S, D - Q
4 A - R, B - P, C - Q , D - S
JEE - 2023
CHXII02:SOLUTIONS

319071 Assertion :
\(1 \mathrm{~mol} \mathrm{KCl}\) in one \(\mathrm{kg}\) of water increases the boiling point by \(2 \times 0.52 \mathrm{~K}\).
Reason :
\(1 \mathrm{~mol}\) of \(\mathrm{KCl}\) in water releases \(1 \mathrm{~mol}\) of \(\mathrm{K}^{+}\)and \(1 \mathrm{~mol}\) of \(\mathrm{Cl}^{-}\)ions.

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.
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CHXII02:SOLUTIONS

319067 The freezing point of one molal \(\mathrm{NaCl}\) assuming \(\mathrm{NaCl}\) to be \(100 \%\) dissociated in water is (molal depression constant is 1.86 ).

1 \(-2.72^{\circ} \mathrm{C}\)
2 \(-3.72^{\circ} \mathrm{C}\)
3 \(2.72^{\circ} \mathrm{C}\)
4 \(3.72^{\circ} \mathrm{C}\)
CHXII02:SOLUTIONS

319068 \({\mathrm{\mathrm{K}_{2} \mathrm{HgI}_{4}}}\) is \({\mathrm{40 \%}}\) ionised in its aqueous solution. The value of its van't Hoff factor is ____ .

1 1.8
2 3
3 1.2
4 2
CHXII02:SOLUTIONS

319069 The degree of dissociation \({\rm{(\alpha )}}\) of a weak electrolyte, \({{\rm{A}}_{\rm{x}}}{{\rm{B}}_{\rm{y}}}\) is related to Van't Hoff factor (i) by the expression

1 \({\rm{\alpha }} = \frac{{{\rm{i}} + 1}}{{{\rm{x}} + {\rm{y}} - 1}}\)
2 \({\rm{\alpha }} = \frac{{{\rm{i}} - 1}}{{({\rm{x}} + {\rm{y}} - 1)}}\)
3 \({\rm{\alpha }} = \frac{{{\rm{x}} + {\rm{y}} - 1}}{{{\rm{i}} - 1}}\)
4 \({\rm{\alpha }} = \frac{{{\rm{x}}\,{\rm{ + }}\,{\rm{y}} + 1}}{{{\rm{i}} - 1}}\)
CHXII02:SOLUTIONS

319070 Match Column \({\text{I}}\) with Column \({\text{II}}\)
supporting img

Choose the correct answer from the options given below:

1 A - R, B - Q , C - P, D - S
2 A - P, B - R, C - Q , D - S
3 A - R, B - P, C - S, D - Q
4 A - R, B - P, C - Q , D - S
JEE - 2023
CHXII02:SOLUTIONS

319071 Assertion :
\(1 \mathrm{~mol} \mathrm{KCl}\) in one \(\mathrm{kg}\) of water increases the boiling point by \(2 \times 0.52 \mathrm{~K}\).
Reason :
\(1 \mathrm{~mol}\) of \(\mathrm{KCl}\) in water releases \(1 \mathrm{~mol}\) of \(\mathrm{K}^{+}\)and \(1 \mathrm{~mol}\) of \(\mathrm{Cl}^{-}\)ions.

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 DIGITAL LIBRARY
CHXII02:SOLUTIONS

319067 The freezing point of one molal \(\mathrm{NaCl}\) assuming \(\mathrm{NaCl}\) to be \(100 \%\) dissociated in water is (molal depression constant is 1.86 ).

1 \(-2.72^{\circ} \mathrm{C}\)
2 \(-3.72^{\circ} \mathrm{C}\)
3 \(2.72^{\circ} \mathrm{C}\)
4 \(3.72^{\circ} \mathrm{C}\)
CHXII02:SOLUTIONS

319068 \({\mathrm{\mathrm{K}_{2} \mathrm{HgI}_{4}}}\) is \({\mathrm{40 \%}}\) ionised in its aqueous solution. The value of its van't Hoff factor is ____ .

1 1.8
2 3
3 1.2
4 2
CHXII02:SOLUTIONS

319069 The degree of dissociation \({\rm{(\alpha )}}\) of a weak electrolyte, \({{\rm{A}}_{\rm{x}}}{{\rm{B}}_{\rm{y}}}\) is related to Van't Hoff factor (i) by the expression

1 \({\rm{\alpha }} = \frac{{{\rm{i}} + 1}}{{{\rm{x}} + {\rm{y}} - 1}}\)
2 \({\rm{\alpha }} = \frac{{{\rm{i}} - 1}}{{({\rm{x}} + {\rm{y}} - 1)}}\)
3 \({\rm{\alpha }} = \frac{{{\rm{x}} + {\rm{y}} - 1}}{{{\rm{i}} - 1}}\)
4 \({\rm{\alpha }} = \frac{{{\rm{x}}\,{\rm{ + }}\,{\rm{y}} + 1}}{{{\rm{i}} - 1}}\)
CHXII02:SOLUTIONS

319070 Match Column \({\text{I}}\) with Column \({\text{II}}\)
supporting img

Choose the correct answer from the options given below:

1 A - R, B - Q , C - P, D - S
2 A - P, B - R, C - Q , D - S
3 A - R, B - P, C - S, D - Q
4 A - R, B - P, C - Q , D - S
JEE - 2023
CHXII02:SOLUTIONS

319071 Assertion :
\(1 \mathrm{~mol} \mathrm{KCl}\) in one \(\mathrm{kg}\) of water increases the boiling point by \(2 \times 0.52 \mathrm{~K}\).
Reason :
\(1 \mathrm{~mol}\) of \(\mathrm{KCl}\) in water releases \(1 \mathrm{~mol}\) of \(\mathrm{K}^{+}\)and \(1 \mathrm{~mol}\) of \(\mathrm{Cl}^{-}\)ions.

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.
Join With Us for More Updates
CHXII02:SOLUTIONS

319067 The freezing point of one molal \(\mathrm{NaCl}\) assuming \(\mathrm{NaCl}\) to be \(100 \%\) dissociated in water is (molal depression constant is 1.86 ).

1 \(-2.72^{\circ} \mathrm{C}\)
2 \(-3.72^{\circ} \mathrm{C}\)
3 \(2.72^{\circ} \mathrm{C}\)
4 \(3.72^{\circ} \mathrm{C}\)
CHXII02:SOLUTIONS

319068 \({\mathrm{\mathrm{K}_{2} \mathrm{HgI}_{4}}}\) is \({\mathrm{40 \%}}\) ionised in its aqueous solution. The value of its van't Hoff factor is ____ .

1 1.8
2 3
3 1.2
4 2
CHXII02:SOLUTIONS

319069 The degree of dissociation \({\rm{(\alpha )}}\) of a weak electrolyte, \({{\rm{A}}_{\rm{x}}}{{\rm{B}}_{\rm{y}}}\) is related to Van't Hoff factor (i) by the expression

1 \({\rm{\alpha }} = \frac{{{\rm{i}} + 1}}{{{\rm{x}} + {\rm{y}} - 1}}\)
2 \({\rm{\alpha }} = \frac{{{\rm{i}} - 1}}{{({\rm{x}} + {\rm{y}} - 1)}}\)
3 \({\rm{\alpha }} = \frac{{{\rm{x}} + {\rm{y}} - 1}}{{{\rm{i}} - 1}}\)
4 \({\rm{\alpha }} = \frac{{{\rm{x}}\,{\rm{ + }}\,{\rm{y}} + 1}}{{{\rm{i}} - 1}}\)
CHXII02:SOLUTIONS

319070 Match Column \({\text{I}}\) with Column \({\text{II}}\)
supporting img

Choose the correct answer from the options given below:

1 A - R, B - Q , C - P, D - S
2 A - P, B - R, C - Q , D - S
3 A - R, B - P, C - S, D - Q
4 A - R, B - P, C - Q , D - S
JEE - 2023
CHXII02:SOLUTIONS

319071 Assertion :
\(1 \mathrm{~mol} \mathrm{KCl}\) in one \(\mathrm{kg}\) of water increases the boiling point by \(2 \times 0.52 \mathrm{~K}\).
Reason :
\(1 \mathrm{~mol}\) of \(\mathrm{KCl}\) in water releases \(1 \mathrm{~mol}\) of \(\mathrm{K}^{+}\)and \(1 \mathrm{~mol}\) of \(\mathrm{Cl}^{-}\)ions.

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.