ICSE ICSE Class 8 - CISCE Question Bank Solutions for Chemistry

Give one word for the following statement :

The change of states of water from one form to another .

Give one word  for the following statement:

The gaseous form of water found in air .

Give one word for the following statement:

A mixture of common salt and ice .

Choose the correct alternative

Lamp black is

Choose the correct alternative

The process by which decayed plants slowly convert into coal is called.

Define the following:

Carbonization

Define the following:

Adsorption

Name the following:

Substances whose atoms or molecules are not arranged in a geometrical pattern. 

Two gases found dissolved in natural water are

The ultimate source of all water on the earth is

What is the smallest particle of water ? Describe it’s structure.

Describe the water-cycle in nature.

How are natural springs of water formed ?

How many carbon atoms are there in Buckminster fullerenes?

Give any three important uses of water.

Explain how the peculiar variation of density of water with temperature can protect marine-life.

Explain how the peculiar variation of density of water with temperature can cause water— pipes to burst in very cold places.

A captain of ship will tell you that an iceberg is much bigger than it looks. Why is it so ?

Answer the following question:

Why is acid added to water before electrolysis ?

Answer the following question:

What is the chemical composition of water ? Give its molecular formula.