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

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.

Give reasons for the following:

Sulphuric acid forms two types of salts with NaOH.

Fill in the blank : 

Magnesium gives ------------(O2, H2, NO) with very dilute nitric acid. 

Fill in the blank: 

------------ (iron / copper) become passive in concentrated nitric acid 

Give reason for the following:
Red brown vapours are produced when concentrated sulphuric acid is added to hydrogen bromide.

Give reasons for the following:

A piece of wood becomes black when concentrated sulphuric acid is poured on it.

Give reasons for the following:

Brisk effervescence is seen when oil of vitriol is added to sodium carbonate.

Copy and complete the following table:

Why are alkali metals kept in kerosene oil?

Write a balanced chemical equation for each of the following reactions :  
 Action of dilute sulphuric acid on sodium hydroxide.