What are alloys?

Metallic oxides of zinc, magnesium and copper were heated with the following metals :

What chemical process is used for obtaining a metal from its oxide?

Name two metals which are found in nature in the free state.

Define the following terms. (i)Mineral (ii) Ore (iii) Gangue

Why do ionic compounds have high melting points?

What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.

What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.

Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute H2SO4.

Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows.

Write equations for the reactions of : (i) iron with steam (ii) calcium and potassium with water

Why is sodium kept immersed in kerosene oil?

Explain the meanings of malleable and ductile.

Give an example of a metal which. (i) is a liquid at room temperature. (ii) can be easily cut with a knife. (iii) is the best conductor of heat. (iv) is a poor conductor of heat.