ICSE ICSE Class 8 - CISCE Question Bank Solutions

Why liquids do not have a definite shape ?

What happens when a solid is heated ?

Give reason for the following.

Gases can be compressed easily.

Give reason for the following.

Liquids can flow easily.

Give reason for the following.

We need to classify things.

Define the following term.

Intermolecular force

Define the following term.

Molecule

Give reason:
 A gas fills up the space available to it.

Give reason:
The odour of scent spreads in a room.

 Give reason:
We can walk through air.

Give reason:
Liquids have definite volume but no difinite shape.

Give reason:
When a teaspoon of sugar is added to half a glass of water and stirred, the water level in the glass does not rise.

Give an experiment to explain that there are intermolecular spaces between water molecules.

Differentiate between the following.

Liquids and gases

Differentiate between the following.
Atoms and molecules

Fill in the blank:

The molecules are at a greater distance in ............. compared to liquids.

Fill in the blank:

Molecules in a.............. are packed very closely.

Fill in the blank:

When a gas is cooled, its molecules.......... energy.

Write true or false  for statement. Rewrite the false statement correctly.

 Matter cannot exist in different states.

Write true or false for statement. Rewrite the false statement correctly.

If the intermolecular space is more than the intermolecular force will be weaker.