ICSE Class 9 - CISCE Question Bank Solutions for Chemistry

What is a chemical reaction?

State the conditions necessary for a chemical change or reaction.

Define the following terms

Precipitate

Give an example of a reaction where the following are involved

Heat

Give an example of a reaction where the following are involved

Light

Give an example of a reaction where the following are involved

Electricity

Give an example of a reaction where the following are involved

Close contact

Give an example of a reaction where the following are involved

Solution

Give an example of a reaction where the following are involved

Pressure

Give an example of a reaction where the following are involved

Catalyst

Define Photochemical reaction
Give an example

Define Electrochemical reaction
Give an example 

Give an example of the following chemical change.

Two gases combine to form white solid

Give an example of the following chemical change.

Two solids combine to form a liquid

Give an example of the following chemical change.

A reaction where colour change is noticed

Write the chemical reaction where the following changes are observed.

Gas is evolved

Write the chemical reaction where the following changes are observed.

Colour change is noticed

Write the chemical reaction where the following changes are observed.

Precipitate is formed

Write the chemical reaction where the following changes are observed.

Physical state is changed

Give reason for the following:

Silver nitrate solution is kept in coloured bottles.