Write a fully balanced equation for each of the following cases:
Magnesium nitrides is treated with warm water.
Mg3N2 +6H2O ----> 3Mg(OH)2+2NH3
Correct the following statements:
For example: chlorine is a bleaching agent.
Should read: moist chlorine is a bleaching agent
Lead bromide conducts electricity.
An aqueous solution of Nickel sulphate contains Ni2+ and SO2-3 ions.
i) which ion moves towards the cathode?
ii) what is the product at the anode?
Find the odd one out and explain your (note: valency is not a criterion)
Copper, lead, zinc, mercury.
Correct the following statement:
For example: chlorine is a bleaching agent.
Should read : moist chlorine is a bleaching agent.
Haematite is the chief ore of aluminium.
The sketch below illustrates the refining of aluminium by Hoope’s process.
(I) Which of A and B is the cathode and which one is the anode?
(II) What is the electrolyte in the tank?
(III) What material is used for the cathode?
State the property of metal being utilised in the following:
Use of metal |
Property |
Zinc in Galvanization |
|
Aluminium in Thermite welding |
|
Write a fully balanced equation for each of the following cases:
Red leads is warmed with concentrated hydrochloric acid
Write a fully balanced equation for each of the following cases:
Magnesium metal is treated with dilute hydrochloric acid.
Correct the following statement:
For example : chlorine is a bleaching agent
Should read: moist chlorine is a bleaching agent.
Hydrochloric acid is prepared in the laboratory by passing hydrogen chloride directly through the water.