1. If 20cm³ gas at 1 atm. is expanded to 50 cm³ at constant T, then what is the final pressure

2. How many of the know elements exist as gases at 25°C?

3. The states of matter having no definite shape but definite volume:

4. The rise or fall of a liquid within a tube of small bore is called:

5. The theory which explains that gases consist of molecules, which are in rapid option is known as:

6. Falling drop of water is spherical due to:

7. The rates of diffusion of gases are inversely proportional to square root of their densities . This statement refers to :

8. The law, which states that at constant temperature, the volume of a given mass of gas is inversely proportional is pressure, is known as:

9. If helium and methane are allowed to diffuse out of the container under the similar conditions of temperature and pressure, then the ratio of rate of diffusion of helium to methane is:

10. When you heat a sample of gas, what happens to the particles that make up the gas?