Question

Identify the odd one ,stating reason for your answer.

a) Aluminium oxide, lead oxide , calcium oxide, zinc oxide

b) Sodium chloride, Hydrogen chloride, Magnesium chloride, Calcium chloride

c) Copper sulphate, Ferrous sulphate ,Ferric sulphate, Calcium chloride

d) Sodium ion, Potassium ion, Calcium ion, ferric ion​

Answer 1

Answer:

a) Aluminium Oxide cause the formulae- Al2O3 where the valency of aluminium is 3 and the valency of other are 2

b)Hydrogen chloride (HCL) as its an acid but others are salts

c) Calcium Chloride Cacl2 As its a salt and others are inorganic compound

d) Ferric ion as it has two stable states of valency .

Explanation: