Liquefaction of Gases
CHXI06:STATES OF MATTER

314264 Critical temperature of \(\mathrm{H}_{2} \mathrm{O}, \mathrm{NH}_{3}, \mathrm{CO}_{2}\) and \(\mathrm{O}_{2}\) are \(647 \mathrm{~K}\), \(405.6 \mathrm{~K}, 304.10 \mathrm{~K}\) and \(154.2 \mathrm{~K}\) respectively. If the cooling starts from \(500 \mathrm{~K}\) to their critical temperature, the gas that liquefies first is

1 \(\mathrm{H}_{2} \mathrm{O}\)
2 \(\mathrm{NH}_{3}\)
3 \(\mathrm{CO}_{2}\)
4 \({{\rm{O}}_{\rm{2}}}\)
CHXI06:STATES OF MATTER

314265 Statement A :
Gases do not liquefy above their critical temperature, even on applying high pressure.
Statement B :
Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.

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.
CHXI06:STATES OF MATTER

314266 Critical temperature of carbon dioxide gas is \(\mathrm{30.98^{\circ} \mathrm{C}}\). Its expected boiling point is

1 \(\mathrm{92.94^{\circ} \mathrm{C}}\)
2 \(\mathrm{30.98^{\circ} \mathrm{C}}\)
3 \(\mathrm{10.33^{\circ} \mathrm{C}}\)
4 \(\mathrm{20.65^{\circ} \mathrm{C}}\)
CHXI06:STATES OF MATTER

314267 Assertion :
\(\mathrm{\mathrm{SO}_{2}}\) gas is easily liquified while \(\mathrm{\mathrm{H}_{2}}\) is not.
Reason :
\(\mathrm{\mathrm{SO}_{2}}\) has low critical temperature while \(\mathrm{\mathrm{H}_{2}}\) has high critical temperature.

1 If both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2 If both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
3 If Assertion is true but Reason is false.
4 If both Assertion is true but Reason is false.
CHXI06:STATES OF MATTER

314264 Critical temperature of \(\mathrm{H}_{2} \mathrm{O}, \mathrm{NH}_{3}, \mathrm{CO}_{2}\) and \(\mathrm{O}_{2}\) are \(647 \mathrm{~K}\), \(405.6 \mathrm{~K}, 304.10 \mathrm{~K}\) and \(154.2 \mathrm{~K}\) respectively. If the cooling starts from \(500 \mathrm{~K}\) to their critical temperature, the gas that liquefies first is

1 \(\mathrm{H}_{2} \mathrm{O}\)
2 \(\mathrm{NH}_{3}\)
3 \(\mathrm{CO}_{2}\)
4 \({{\rm{O}}_{\rm{2}}}\)
CHXI06:STATES OF MATTER

314265 Statement A :
Gases do not liquefy above their critical temperature, even on applying high pressure.
Statement B :
Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.

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.
CHXI06:STATES OF MATTER

314266 Critical temperature of carbon dioxide gas is \(\mathrm{30.98^{\circ} \mathrm{C}}\). Its expected boiling point is

1 \(\mathrm{92.94^{\circ} \mathrm{C}}\)
2 \(\mathrm{30.98^{\circ} \mathrm{C}}\)
3 \(\mathrm{10.33^{\circ} \mathrm{C}}\)
4 \(\mathrm{20.65^{\circ} \mathrm{C}}\)
CHXI06:STATES OF MATTER

314267 Assertion :
\(\mathrm{\mathrm{SO}_{2}}\) gas is easily liquified while \(\mathrm{\mathrm{H}_{2}}\) is not.
Reason :
\(\mathrm{\mathrm{SO}_{2}}\) has low critical temperature while \(\mathrm{\mathrm{H}_{2}}\) has high critical temperature.

1 If both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2 If both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
3 If Assertion is true but Reason is false.
4 If both Assertion is true but Reason is false.
CHXI06:STATES OF MATTER

314264 Critical temperature of \(\mathrm{H}_{2} \mathrm{O}, \mathrm{NH}_{3}, \mathrm{CO}_{2}\) and \(\mathrm{O}_{2}\) are \(647 \mathrm{~K}\), \(405.6 \mathrm{~K}, 304.10 \mathrm{~K}\) and \(154.2 \mathrm{~K}\) respectively. If the cooling starts from \(500 \mathrm{~K}\) to their critical temperature, the gas that liquefies first is

1 \(\mathrm{H}_{2} \mathrm{O}\)
2 \(\mathrm{NH}_{3}\)
3 \(\mathrm{CO}_{2}\)
4 \({{\rm{O}}_{\rm{2}}}\)
CHXI06:STATES OF MATTER

314265 Statement A :
Gases do not liquefy above their critical temperature, even on applying high pressure.
Statement B :
Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.

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.
CHXI06:STATES OF MATTER

314266 Critical temperature of carbon dioxide gas is \(\mathrm{30.98^{\circ} \mathrm{C}}\). Its expected boiling point is

1 \(\mathrm{92.94^{\circ} \mathrm{C}}\)
2 \(\mathrm{30.98^{\circ} \mathrm{C}}\)
3 \(\mathrm{10.33^{\circ} \mathrm{C}}\)
4 \(\mathrm{20.65^{\circ} \mathrm{C}}\)
CHXI06:STATES OF MATTER

314267 Assertion :
\(\mathrm{\mathrm{SO}_{2}}\) gas is easily liquified while \(\mathrm{\mathrm{H}_{2}}\) is not.
Reason :
\(\mathrm{\mathrm{SO}_{2}}\) has low critical temperature while \(\mathrm{\mathrm{H}_{2}}\) has high critical temperature.

1 If both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2 If both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
3 If Assertion is true but Reason is false.
4 If both Assertion is true but Reason is false.
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CHXI06:STATES OF MATTER

314264 Critical temperature of \(\mathrm{H}_{2} \mathrm{O}, \mathrm{NH}_{3}, \mathrm{CO}_{2}\) and \(\mathrm{O}_{2}\) are \(647 \mathrm{~K}\), \(405.6 \mathrm{~K}, 304.10 \mathrm{~K}\) and \(154.2 \mathrm{~K}\) respectively. If the cooling starts from \(500 \mathrm{~K}\) to their critical temperature, the gas that liquefies first is

1 \(\mathrm{H}_{2} \mathrm{O}\)
2 \(\mathrm{NH}_{3}\)
3 \(\mathrm{CO}_{2}\)
4 \({{\rm{O}}_{\rm{2}}}\)
CHXI06:STATES OF MATTER

314265 Statement A :
Gases do not liquefy above their critical temperature, even on applying high pressure.
Statement B :
Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.

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.
CHXI06:STATES OF MATTER

314266 Critical temperature of carbon dioxide gas is \(\mathrm{30.98^{\circ} \mathrm{C}}\). Its expected boiling point is

1 \(\mathrm{92.94^{\circ} \mathrm{C}}\)
2 \(\mathrm{30.98^{\circ} \mathrm{C}}\)
3 \(\mathrm{10.33^{\circ} \mathrm{C}}\)
4 \(\mathrm{20.65^{\circ} \mathrm{C}}\)
CHXI06:STATES OF MATTER

314267 Assertion :
\(\mathrm{\mathrm{SO}_{2}}\) gas is easily liquified while \(\mathrm{\mathrm{H}_{2}}\) is not.
Reason :
\(\mathrm{\mathrm{SO}_{2}}\) has low critical temperature while \(\mathrm{\mathrm{H}_{2}}\) has high critical temperature.

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