Decomposition reactions require energy either in the form of heat or light or electricity for breaking down the reactants. Write one equation each for decomposition reactions where energy is supplied in the form of heat, light and electricity.
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Decomposition reactions with heat
CaCO3 → CaO + CO2
2FeSO4 → Fe2O3 + SO2 + SO3
2Pb(NO3)2→ 2PbO + 4NO2 + O2
Decomposition reactions with light
2AgCl → 2Ag + Cl2
2AgBr→ 2Ag + Br2
Decomposition reactions with electricity
2H2O→ 2H2 + O2
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Heat--caco3--cao+co2
light--agcl--ag+ cl2
electricity--h2o--h2+o2
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