
You are given the following material:
- Copper powder
Identify the type of chemical reaction taking place when, on heating copper powder in the air on a China dish, the surface of the copper powder turns black.
Important Questions on Chemical Reactions And Equations
You are given the following material:
- Ferrous sulphate crystals
Identify the type of chemical reaction taking place when, on heating green coloured ferrous sulphate crystals, reddish brown solids are left and the smell of a gas having an odour of burning sulphur is observed.

You are given the following materials:
- Iron nails
- Copper sulphate solution
Identify the type of chemical reaction taking place when iron nails are left dipped in blue copper sulphate solution becomes brownish in colour and the blue colour of copper sulphate fades away.

You are given the following material:
- Quick lime
Identify the type of chemical reaction taking place when quick lime reacts vigorously with water, releasing a large amount of heat.

Write a balanced equation by predicting the products of the following reaction. Include the physical state of each element or compound.
The combination of barium and iodine.

Write a balanced equation by predicting the products of the following reaction. Include the physical state of each element or compound.
The neutralisation of aqueous rubidium hydroxide with hydrobromic acid.

Write a balanced equation by predicting the products of the following reaction. Include the physical state of each element or compound.
A single-replacement reaction of calcium metal with nitric acid solution.

Write a balanced equation by predicting the products of the following reaction. Include the physical state of each element or compound.
The combustion of solid naphthalene.

Write a balanced equation by predicting the products of the following reaction. Include the physical state of each element or compound.
Decomposition of aluminium hydroxide into solid aluminium oxide and gaseous water.
