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

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. 

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

State one observation for the following:

Concentrated nitric acid is reacted with sulphur.

State one observation for each of the following  : 
Lead nitric is heated strongly in a test tube. 

The pH values of three solutions A, B and C are given in the table. Answer the following questions:

1. Which solution will have no effect on litmus solution?
2. Which solution will liberate CO₂ when reacted with sodium carbonate?
3. Which solution will turn red litmus solution blue?

 The pH values of three solutions A, B and C are given in the table. Answer the folloiwng questions: 

 Which solution will liberate CO₂ when reacted with sodium carbonate? 

 Name the particles present in : 
Strong electrolyte 

Distinguish between the following pairs of compounds using the reagent given in the bracket.
Mangenese dioxide and copper (II) oxide. (using concentrated HCl) 

 Distinguish between the following pairs of compounds using the reagent given in the bracket.
Ferrous sulphate solution and ferric sulphate solution. (Using sodium hydroxide solution) 

Distinguish between the following pairs of compounds using the reagent given in the bracket.
Dilute hydrochloric acid and dilute sulphuric acid. (Using lead nitrate solution) 

Complete the following equations : 
  S + conc.HNO₃ → 

 Complete the following equations :
 C + cons. H₂SO₄   

 Complete the following equations : 
3 Cu + dil. HNO3 

 Match the alloys given in column I to the uses given in column II : 

State differences between the properties of ionic compounds and covalent compounds.