Q13 of 26 Page 70

Give the formulae of the stable binary compounds that would be formed by the combination of following pairs of elements

(a) Mg and N2


(b) Li and O2


(c) Al and Cl2


(d) K and O2

(a) Mg and N2: Mg3N2 (magnesium nitride)



(b) Li and O2: LiO2 (lithium oxide)



(c) Al and Cl2: Al2Cl3 (Aluminium chloride)



(d) K and O2: K2O (Potassium oxide)



More from this chapter

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11

The reaction of a metal ‘X’ with Fe2O3 is highly exothermic and is used to join broken railway, tracks. Identify metal ‘X’. Write the balanced chemical equation of its reaction with Fe2O3. State the special name given to this reaction.

 12

What will you observe when:

(a) Some zinc pieces are put into copper sulphate solution?


(b) Some silver pieces are put into green coloured ferrous sulphate solution?

 14

Write the chemical equations for the reactions taking place when:

(a) Magnesium ribbon is burnt in presence of air.


(b) Sodium metal catches fire in contact with water.


(c) Steam is passed over hot aluminium.

 15

Compare the properties of a typical metal and a non-metal on the basis of the following:

i. Nature of the oxide formed by them


ii. Conductivity