Assertion : The angle of contact of a liquid decreases with increase in temperature.
Reason : With increase in temperature the surface tension of liquid increases

Assertion: A needle placed carefully on the surface of water may float.

Reason: A needle placed carefully on the surface of water may float due to surface tension as upward force due to surface tension balances the weight of the needle.

Assertion: The angle of contact does not depend upon the inclination of the solid in the liquid.

Reason: The angle of contact depends on cohesive and adhesive forces.

Assertion: Surface tension of liquid decreases with increase in temperature.

Reason: Cohesive force between liquid molecules increase with increase in the temperature.

Assertion: A thin stainless steel needle can lay floating on still water surface.

Reason: Any object floats when the buoyant force balances the weight of the object.

Assertion: Surface energy of an oil drop is same whether placed on glass or water surface.

Reason: Surface energy is dependent only on the properties of oil.

Assertion: When temperature of a liquid is increased, then its surface tension decreases.

Reason: Kinetic energy and oscillations of molecules increases, so intermolecular force of attraction decreases.