What are SI units of surface tension and coefficient of viscosity?

Viscosity of liquids decreases as the temperature rises. Why?

What are intermolecular forces?

64.

Name two solids which directly change into vapours on heating.

Does the volume of a solid change on slight heating?

How are the following properties of a gas measured:
(i) Mass    (ii) Volume?

How pressure of a gas is determined experimentally?

What are the units of pressure?

A manometer is connected to a gas containing bulb. The open arm reads 43.7 cm where the arm connected to the bulb reads 15.6 cm. If the barometric pressure is 743 nm mercury what is the pressure of the gas in a bar?