Question

a). select the most and the least reactive metals from the following list of metals : magnesium, sodium, aluminium, silver

Answer 1

The most reactive metal from These is sodium and least reactive metal is silver.

The reactivity series shows :-

Sodium ↓

Magnesium ↓ ( reactivity decreases )

Aluminium. ↓

Silver ↓

Answer 2

Silver aluminium magnisium sodium and Sodium is considered as the reactive with natural environment and it has to be stored as paraffin oil.

According to the different aspects, Sodium tarnishes at room temperature in air and burning sodium in air produces the sodium oxide Na2O as well as about 20% sodium peroxide Na2O2.

Magnesium tarnishes air producing film of magnesium oxide and prevents further reaction.