Question -
Answer -
(a) Unbalanced KBr + BaI2 → KI + BaBr2
Balanced 2KBr + BaI2 → 2KI + BaBr2 (Double Displacement Reaction)
(b) Unbalanced ZnCO3 → ZnO + CO2
Balanced ZnCO3 → ZnO + CO2 (Decomposition Reaction)
(c) Unbalanced H2 + Cl → HCl
Balanced H2 + Cl → 2HCl (Combination Reaction)
(d) Unbalanced Mg + HCl → MgCl2 + H2
Balanced Mg + 2HCl → MgCl2 + H2 (Displacement Reaction)