When a beam of sunlight enters a room through a window, we can see tiny particles X suspended in a gas (or rather a mixture of gases) Y which are moving rapidly in a very haphazard manner.
(a) What could particles X be ?
Name the gas (or mixture of gases) Y.
(c ) What is the phenomenon exhibited by particles X known as ?
(d) What is causing the movement of particles X ?
(e) What conclusion does the existence of this phenomenon give us about the nature of matter ?

What happens when a beam of sunlight enters a dusty room through a window ? Explain your answer.

The nitrate which when heated gives off a gas (or) a mixture of gases which cannot relight a glowing splinter is

The nitrate which when heated gives off a gas or a mixture of gases which cannot relight a glowing splinter is:

Pressure contributed by an individual gas in a mixture of gases is called

When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface. What could particles X be ? (b) What do you think liquid Y is ? (c ) What is zig-zag movement of X known as ? (d) What is causing the zig-zag movement of particles X ? (e) Name the scientist who discovered this phenomenon. (f) What does this experiment tell us about the nature of liquid Y ?

The mixture of gases that forms gobar gas are-

……….the pressure contributed by an individual gas in a mixture of gases.