ICSE ICSE Class 8 - CISCE Question Bank Solutions

State the main postulates of the kinetic theory with special reference to – Energy possessed by particles of matter.

With reference to inter-conversion of matter – on the basis of kinetic theory – explain in brief the conversion of A solid into a liquid With special reference to inter-particle space & interparticle attraction at the different stages of conversion.

With reference to inter-conversion of matter – on the basis of kinetic theory – explain in brief the conversion of A liquid into vapour [or gas] With special reference to inter-particle space & interparticle attraction at the different stages of conversion.

With reference to inter-conversion of matter – on the basis of kinetic theory – explain in brief the conversion of Vapour [or gas] into a liquid With special reference to inter-particle space & interparticle attraction at the different stages of conversion.

With reference to inter-conversion of matter – on the basis of kinetic theory – explain in brief the conversion of A liquid into a solid With special reference to inter-particle space & interparticle attraction at the different stages of conversion.

On the basis of kinetic theory explain why ammonium chloride sublims and goes from solid-state directly into vapour state.

The kinetic energy of molecules in helium is ______ compared to the kinetic energy of molecules in water. 

Give reason for the following 

Particles of matter possess energy called kinetic energy.

What is a chemical reaction?

A chemical reaction is often accompanied by external indications or characteristics which include – 

1. Colour change
2. Effervescence or gas evolved
3. Evolution or absorption of heat
4. Formation of a precipitate.

With reference to each of the above indications, state the external indication seen during – Addition of dilute acid to an active metal.

A chemical reaction is often accompanied by external indications or characteristics which include – 

1. Colour change
2. Effervescence or gas evolved
3. Evolution or absorption of heat
4. Formation of a precipitate.

With reference to each of the above indications, state the external indication seen during – Addition of dilute hydrochloric acid to silver nitrate.

A chemical reaction is often accompanied by external indications or characteristics which include – 

1. Colour change
2. Effervescence or gas evolved
3. Evolution or absorption of heat
4. Formation of a precipitate.

With reference to each of the above indications, state the external indication seen during – Addition of water to quicklime.

A chemical reaction is often accompanied by external indications or characteristics which include – 

1. Colour change
2. Effervescence or gas evolved
3. Evolution or absorption of heat
4. Formation of a precipitate.

With reference to each of the above indications, state the external indication seen during – Thermal decomposition of mercury [II] oxide.

Differentiate between the following:

Neutralization reaction and a precipitation reaction.

Match the chemical reactions in List I with the appropriate answer in List II.

Give three reasons why carbon dioxide finds application in fire extinguishers.

Write the molecular formulae of Copper oxide.

Write the molecular formula of the following compounds of Sulphur trioxide.

Find the number and names of elements present in them and calculate their molecular masses.

Write the molecular formula of the following compounds of Iron (II) sulphide and.

Find the number and names of elements present in them and calculate their molecular masses.

Write the molecular formula of the following compounds of Ammonia

Find the number and names of elements present in them and calculate their molecular masses.