ICSE ICSE Class 8 - CISCE Question Bank Solutions for Chemistry

State which type of chemical reaction proceeds with evolution of heat energy.

State which type of chemical reaction proceeds with the absorption of heat energy.

State the following reaction whether heat is evolved or absorbed – 

water is added to quicklime

State the following reaction whether heat is evolved or absorbed – 

Two neutral gases on passage through an electric are given nitric oxide.

State the following reaction whether heat is evolved or absorbed – 

Two neutral gases combine to give a basic gas.

Complete the statement by filling in the blank with the correct word:

The element molybdenum used in the reaction of nitrogen with hydrogen at elevated temperatures is an example of a ________.

Complete the statement by filling in the blank with the correct word:

The reaction of coke with steam to give water gas is an example of an __________ reaction.

Give a balanced equation for the following type of reaction:

A catalytic, reversible, exothermic reaction.

Differentiate between the following:

A catalyst and a promoter.

Explain the following reaction with one suitable example .
Decomposition reaction

Name the type of chemical reaction shown by the following equation:

2Mg+ O₂ →  2MgO

Name the type of chemical reaction shown by the following equation:

Fe + CuSO₄ → FeSO₄ +Cu

 Fill in the blank .

Soluble bases are called ............

Write your observations and name the product when

Iron nails are added to an aqueous solution of copper sulphate.

Explain the term of solution.

Explain the term of  Solute.

How do the solubility of a solid and a gas affected by Increase in pressure.

Differentiate between Suspension and colloid.

What do you observe when Phenolphthalein is added to sodium hydroxide solution.

What do you observe when Blue litmus paper is dipped in dilute hydrochloric acid.