5(iv)
Identify the gas evolved in each of the following reactions:
(a) Methane undergoes complete combustion.
(b) Copper carbonate is heated.
(c) MnO2 reacts with concentrated HCl.
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(a) Carbon dioxide
CH4 + 2O2 ⟶ CO2 + 2H2O
(b) Carbon dioxide
CuCO3 ⟶ CuO + CO2
(c) Chlorine
MnO2 + 4HCl ⟶ MnCl2 + 2H2O + Cl2