Question

Question 10.
State the type of reactions each of the following represent and balance the ones that are not balanced.
(a) Cl2 + 2KBr → 2KCl + Br2
(b) NaOH + HCl → NaCl + H2O
(c) 2HgO → 2Hg + O2
(d) Fe + CuSO4→ FeSO4 + Cu
(e) PbO2 + SO2→ PbSO4
(f) 2KClO3→ 2KCl + 3O2
(g) 2H2O2→ 2H2O + O2
(h) KNO3 + H2SO4 → HNO3 + KHSO4
(i) CuO + H2→ Cu+ H2O
(j) CaCO2→ CaO + CO2
(k) NH4Cl → NH3 + HCl
(l) PbO + 2HNO3→ Pb(NO3) + 2H2O
(m) AgNO3 + NaCl → AgCl + NaNO3

Solution:

Cl2 + 2KBr → 2KCl + Br2
Displacement
Fe + CuSO4 → FeSO4 + Cu
Displacement
2H2O → 2Hg + O2
Decomposition
PbO2 + SO2 → PbSO4
Combination
AgNO3 + NaCl → AgCl + NaNO3
Double decomposition
2KClO3 → 2KCl + 3O2
Decomposition
2H2O2 → 2H2O + O2
Decomposition
KNO3 + H2SO4 → HNO3 + KHSO4
Double decomposition
CuO + H2 → Cu + H2O
Displacement
CaCO3 → CaO + CO2
Decomposition
NH4Cl → NH3 + HCl
Decomposition
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Answer 1

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