51.
A liquid is kept in a glass beaker. Which one of the following statement is correct regarding the pressure exerted by the liquid column at the base of the beaker?

52.
The substance which does not expand on going from liquid state to solid state is

55.
Lowering the atmospheric pressure on a liquid

59.
Consider the following statements.
1. The rate of diffusion of liquids is higher than that of solids.
2. In the liquid state, particles move freely and have greater space between each other as compared to particles in the solid state.
Which of the statement(s) given above is/are correct.

60.
Ammonia (NH3) obtained from different sources always has same proportion of nitrogen and hydrogen. It proves the validity of law of