ICSE Class 8 Answered
(a) Calcium nitrate
Symbol Ca NO3
Valency: Ca2+ NO31-
1- 2+
Formula: Ca(NO3)2
(b) Sodium chloride
Symbol Na Cl
Valency: Na2+ Cl2-
2- 2+
Formula: Na2Cl2 = NaCl
(c) Magnesium sulphate
Symbol Mg SO4
Valency: Mg2+ SO42-
2- 2+
Formula: Mg2(SO4)2 = MgSO4
(d) Ammonium bicarbonate
Symbol NH4 HCO3
Valency: NH4+1 HCO31-
1- 1+
Formula: NH4HCO3
(e) Aluminium oxide
Symbol Al O
Valency: Al3+ O2-
2- 3+
Formula: Al2O3