Assertion: Liquids tend to have a maximum number of molecules at their surface.

Reason: Small liquid drops have a spherical shape.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true and the reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Assertion is false but the reason is true.

Assertion: At the critical temperature, the liquid passes into a gaseous state imperceptible and continuously.

Reason: The density of the liquid and gaseous phase is equal to critical temperature.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true and the reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Assertion is false but the reason is true.

Assertion: Gases do not liquefy above their critical temperature, even on applying high pressure.

Reason: Above the critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true and the reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Assertion is false but the reason is true.

Assertion: The temperature at which the vapor pressure of a liquid is equal to the external pressure is called boiling temperature.

Reason: At high altitudes atmospheric pressure is high.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true and the reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Assertion is false but the reason is true.

Assertion: At constant temperature, pV vs p plot for real gases is not a straight line.

Reason: At high pressure, all gases have Z>1 but at an intermediate pressure most gases have Z<1.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true and the reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Assertion is false but the reason is true.

Assertion: Three states of matter are the result of a balance between intermolecular forces and the thermal energy of the molecules.

Reason: Intermolecular forces tend to keep the molecules together but the thermal energy of molecules tends to keep them apart.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true and the reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Assertion is false but the reason is true.

Assertion: Critical temperatures for carbon dioxide and methane are 31.1 °C and –81.9 °C  respectively.

Reason: The intermolecular forces of attraction are stronger in CO₂ than CH₄

1.  Both assertion and reason are true and reason is the correct explanation of assertion
2.  Both assertion and reason are true, but reason is not the correct explanation of assertion
3.  Assertion is true, but reason is false
4.  Both Assertion and reason are false