ICSE ICSE Class 8 - CISCE Question Bank Solutions for Chemistry

What are the two conditions for the interconversion of states of matter ?

How a liquid changes into its gaseous state ? Explain ?

Water cycle is an example of inter conversion of states of water. Explain.

State the general properties of a solid.

Give reason for the following.

Pure substances have fixed melting or boiling points.

Give reason for the following.

Electricity is not considered matter.

Define the following term.

Element

Define the following terms.

Atom

Write your observation and conclusion for the following.

When a small stone is gently dipped into a glass filled with water.

Write your observation and conclusion for the following:

When one of the balloons suspended to the metre scale is punctured while other remains inflated ?

How will you prove by an experiment that solids occupy space ?

 Name the three states of matter and define them.

Give reason:
 Why do liquids and gases flow but solids do not ?

 Give reason:
When an empty gas jar is inverted over a gas jar containing a coloured gas, the gas also spreads into the empty jar.

Give reason:
A red ink drop added to small amount of water in a glass turns water red in some time.

 Fill in the blank:

Water is a matter because it has mas and occupies....................

Fill in the blank:

Any matter which has a definite.................... but no definite shape is called a...............

Fill in the blank:

..............can flow

Fill in the blank:

Water boils at ............

 Fill in the blank:

The physical state of a substance, which has a fixed volume but no fixed shape is .........