(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

Give a balanced equation for thermal decomposition of mercury [II] oxide

Give a balanced equation for thermal decomposition of calcium hydroxide

Define a thermal dissociation reaction with a suitable example.

Give an example of a photochemical decomposition reaction.

Name a metallic oxide which on thermal decomposition is reduced to metal.

Define a displacement reaction with a suitable example. 

State how displacement reaction represented.

Give a reason why zinc displaces hydrogen from dilute sulphuric acid but copper does not.

Explain the term double decomposition precipitation reaction.

Give a balanced equation for the preparation of two different insoluble lead salts from their salt solutions by double decomposition precipitation.

Define the term – double decomposition – neutralization reaction.

State the double decomposition – neutralization reaction with a suitable representation.

Convert an insoluble base

Convert a soluble base to their respective soluble salts by neutralization reaction.

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

Direct combination reaction of sulphur dioxide with water gives ________.

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

Formation of hydrogen chloride from hydrogen and chlorine is an example of __________.

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

The neutral gas evolved when lead nitrate undergoes thermal decomposition is _________.

Select the correct answer from the options given below:

State the gaseous product formed, when

A metallic nitrate undergoes thermal decomposition giving a coloured gas.

Give a balanced equation for the following type of reaction:

A direct combination reaction between phosphorus and neutral gas.

Give a balanced equation for the following type of reaction:

A soluble salt of lead formed from an insoluble base by double decomposition – neutralization.