HARD
9th CBSE
IMPORTANT
Earn 100

Look at the diagram below. Jar A contains a red-brown gas whereas jar B contains a colourless gas. The two gas jars are separated by a glass plate placed between them. After some time when the glass plate is removed it is seen that jar A and jar B turns reddish-brown.

Question Image

Name one coloured solid and one colourless liquid which can show the same phenomenon.

Important Questions on Matter in Our Surroundings

HARD
9th CBSE
IMPORTANT
Why is liquid (the hydraulic fluid) used to operate the brakes in a car ?
MEDIUM
9th CBSE
IMPORTANT

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 the warmer the liquid Y, the faster the particles X moved on its surface.

What could particles X be ?

MEDIUM
9th CBSE
IMPORTANT


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 do you think liquid Y is?

MEDIUM
9th CBSE
IMPORTANT

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 the warmer the liquid Y, the faster the particles X moved on its surface.

What is the zig-zag movement of X known as ?

MEDIUM
9th CBSE
IMPORTANT

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 causes the zig-zag movement of particles X?

MEDIUM
9th CBSE
IMPORTANT

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 the warmer the liquid Y, the faster the particles X moved on its surface. 

Name the scientist who discovered this phenomenon.

 

MEDIUM
9th CBSE
IMPORTANT

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 the warmer the liquid Y, the faster the particles X moved on its surface.

What does this experiment tell us about the nature of liquid Y?

EASY
9th CBSE
IMPORTANT

What is the common unit of temperature?