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

In the preparation of nitric acid from KNO₃ concentrated sulphuric acid is used in place of hydrochloric acid. Why?

Give reason why concentrated nitric acid prepared in the laboratory is yellow in colour. State how the colour of the acid is removed.

Give reasons for the following:
In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitrate should not be heated very strongly above 200°C. 

Nitric acid cannot be concentrated beyond 68% by the distillation of a dilute solution of HNO₃. State the reason.

Write a balanced equation and name the products formed when sodium hydrogen carbonate is added to nitric acid.

Write a balanced equation and name the products formed when concentrated nitric acid is heated.

 Choose the method of preparation of the following salts, from the methods given in the list:
[List :  A. Neutralization B. Precipitation  C. Direct combination D. Substitution ]
(i) Lead chloride
(ii) Iron (II) sulphate
(iii) Sodium nitrate

(iv) Iron (III) chloride 

 Identify the substance underlined: 
The dilute acid which is an oxidizing agent. 

Explain hydronium ion. Write the ionization of sulphuric acid showing the formation of hydronium ion.

How many salts can be obtained from ortho phosphoric acid? Is there any difference in the salts formed by the acid?

Give the preparation of the salt given in the left column by matching with the methods given in the right column. Write balanced equations for each preparation.

State how would you prepare copper (II) oxide from
Copper nitrate

State how would you prepare copper (II) oxide from
Copper Carbonate

State how would you prepare copper (II) oxide from
copper sulphate

Give equation to prepare the following as directed
MgCO₃ from MgCl₂

Give equation to prepare the following as directed
PbCO₃ from Pb(NO₃)

Give equation to prepare the following as directed
NaHCO₃ from Na₂CO₃

From the list of the substances given, name the substances which you would use to prepare each of the following salts:
List of substances: Copper, lead, sodium, zinc, copper oxide, lead carbonate, sodium carbonate solution, dilute hydrochloric acid, dilute nitric acid and dilute sulphuric acid.
Salts: (a) zinc sulphate (b) copper sulphate (c) sodium sulphate (d) lead sulphate.

Define the following term:

Neutralisation

Some methods used for the laboratory preparation of salts are:
(a) Metal + acid
(b) Carbonate + acid
(c) Precipitation
(d) Direct combination
(e) Titration
Copy and complete the following table :