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

Explain the meanings of malleable and ductile.

Why sodium is kept immersed in kerosene oil?

Write equations for the reactions of:

(i) iron with steam

(ii) calcium with water

(iii) potassium with water

Samples of four metals A, B, C and D were taken and added to the solutions given in the following table, one by one. The results obtained are as follows:

Use the above table to answer the following questions about metals A, B, C and D:

(i) Which is the most reactive metal?

(ii) What would you observe when metal B is added to a solution of copper (II) sulphate?

(iii) Arrange the metals A, B, C and D in the order of decreasing reactivity.