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

Describe all what you will observe and write chemical equation, when limited amount of ammonia gas is passed through the following aqueous solution:

FeCl₃

Correct the following statement:
Hydrochloric acid is prepared in the laboratory by passing hydrogen chloride directly through water.

Describe all what you will observe and write chemical equation, when limited amount of ammonia gas is passed through the following aqueous solution:

 Pb(NO₃)₂

Aqua regia is a mixture of ______.

Describe all what you will observe and write chemical equation, when limited amount of ammonia gas is passed through the following aqueous solution:

 CuSO₄

Describe all what you will observe and write chemical equation, when limited amount of ammonia gas is passed through the following aqueous solution:

CrCl₃

Choose the correct answer from the options given below :

Ammonia reacts with excess chlorine to form

In the laboratory preparation of hydrochloric acid, HCl gas is dissolved in water.

1. Draw a diagram to show the arrangement used for the absorption of HCl gas in water.
   
2. State why such an arrangement is necessary? Give two reasons for the same.
3. Write the chemical equation for the laboratory preparation of HCl gas when the reaction is:
   1. Below 200°C
   2. Above 200°C

Choose the correct answer from the options given below :

Nessler's reagent is an alkaline solution of

State one appropriate observation of the following:

Copper sulphate is treated with dilute hydrochloric acid.

Complete and balance the equation: CuO(heated) + NH_{3 →} 

State one appropriate observation of the following:
Which gas is evolved when potassium sulphite with dilute hydrochloric acid.

State one appropriate observation of the following:
Concentrated HCl is made to react with mangesediaoxide

State one appropriate observation of the following:
Action of dilute HCl or sodium sulphite.

The following question is pertaining to the laboratory preparation of hydrogen chloride gas.

State a safety precaution you would take during the preparation of hydrochloric acid.

Copy and complete the following equations :

(i) Mg₃N₂ + 6H₂O →
(ii) 2NH₃ + 3CuO →
(iii) 8NH₃ + 3Cl₂ →
(iv) 4NH₃ + 5O₂ →

State your observation when dilute hydrochloric acid is added to sodium thiosulphate.