(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

What is the alternative of chlorofluorocarbon?

State the advantages of using ammonia as refrigerant?

Ammonia is a good refrigerant but it shows some disadvantages when used as refrigerant. State the disadvantages.

Write the equation for the action of heat on ammonium chloride.

State whether the reaction is an example of thermal decomposition or thermal dissociation.

Write the equation for the action of heat on ammonium nitrate.

State whether the reaction is an example of thermal decomposition or thermal dissociation.

Comment, sulphuric acid is referred to as King of chemicals.

Comment, sulphuric acid is referred to as oil of vitriol.

Correct the following, if required:

HNO₃ is a strong reducing agent.

Correct the following, if required:

NaNO₃ gives NO₂ and O₂ on heating.

Correct the following, if required:

Constant boiling nitric acid contains 80% nitric acid by weight.

Correct the following, if required: 

Nitric acid remains colourless even when exposed to light.

Name a nitrate of metal which on heating does not give nitrogen dioxide.

Name a nitrate which on heating leaves no residue behind. 

From the following list of substances, choose one substance in each case which matches the description given below:  

Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate, zinc carbonate. 

A nitrate which gives off only oxygen when heated 

What is the name given to the salts of sulphurous acid?

From the following list of substances, choose one substance in each case which matches the description given below:
Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate, zinc carbonate. 

A nitrate which on heating decomposes into dinitrogen oxide [nitrous oxide] and steam. 

What is the name given to the salts of sulphuric acid?

From the following list of substances, choose one substance in each case which matches the description given below:
Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate, zinc carbonate. 

A nitrate which gives off oxygen and nitrogen dioxide when heated. 

Fill in the blank: 

Aqua regia is a mixture of 3 parts ------------ and one part ------------. 

Fill in the blank: 

The catalytic oxidation of ammonia to nitric oxide is ------------. (exothermic / endothermic)
process.