Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.

Explanation

(i) `MgCO_(3) overset("heat")to MgO + CO_(2)`
(ii) `2AgCl overset("light")to 2Ag + Cl_(2)`
(iii) `2NaCl overset("electricity")to 2Na + Cl_(2)`.