Gas laws

Front

In which condition does the distance between molecules of hydrogen gas increase? Options: 1. Increasing pressure on hydrogen in a closed container and increasing the volume of the container. 2. Increasing pressure on hydrogen in a closed container and adding more hydrogen without increasing the volume. 3. Some hydrogen gas leaking out and increasing the volume of the container. 4. Some hydrogen gas leaking out and adding more hydrogen without increasing the volume.

Back

Some hydrogen gas leaking out and increasing the volume of the container.

Front

Choose the incorrect sentence:

• Each potassium itself must be made up of millions of small particles which keep on spreading and imparting color to more and more of water.
• When we light an incense stick in one corner of a room, its fragrance spread in the whole room quickly.
• The best evidence that particles of matter are constantly moving comes from the studies of diffusion and Brownian motion.
• When a few crystals of copper sulphate are placed at the bottom of a beaker containing water, then water in the whole beaker turns green slowly.

Back

When a few crystals of copper sulphate are placed at the bottom of a beaker containing water, then water in the whole beaker turns green slowly.

Front

When heat is constantly supplied by a burner to boiling water, what happens to the temperature of water during vaporization?

Back

The temperature does not rise at all.

Front

Choose the correct statement:
1. Ammonia gas can be liquefied by applying high pressure and lowering the temperature.
2. Solid carbon dioxide is stored under less-high pressure.
3. The conversion of solid carbon dioxide into carbon dioxide gas is a change of state which is caused by the increase in pressure and decrease atmospheric temperature.
4. Whatever be the temperature at which evaporation take place, the latent heat of vaporization need not be supplied whenever a liquid change into vapour or gas.

Back

Ammonia gas can be liquefied by applying high pressure and lowering the temperature.

Front

During summer, water kept in a pot becomes cool because of the phenomenon of: [A]. Diffusion, [B] Transpiration, [C]. Osmosis, [D]. Evaporation

Back

Evaporation

Front

A centigrade and a Fahrenheit thermometer are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers 140. What is the fall in temperature as registered by the Centigrade thermometer?

Back

40

Front

Under what conditions does a gas behave like an ideal gas?

Back

Low pressure and high temperature

Front

Which of the following gases has the lowest average speed at 25°C? NH3, O2, CH4, H2S

Back

H2S

Front

If the four tubes of a car are filled to the same pressure with N₂, O₂, H₂, and Ne separately, which one will be filled first?

Back

N₂

Front

Choose correct equation of Boyle's Law

Back