Question

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Answer 1

A smell of burning sulphur is obtained due to the formation of sulphur dioxide gas. When the decomposition is carried out by electricity, it is called electrolysis. When decomposition reaction is carried out by light it is called Photochemical decomposition.

OR

Photodecomposition reaction is one in which the compound breaks when a light of sutable wavelength falls over it . For eg. Breaking of silver chloride into silver and chloride in the presence of sunlight.

Answer 2

Photo decomposition is a chemical reaction in which a substance is broken down into simple substances by exposure to light (photons). Thermal decomposition reaction (Thermolysis) Decomposition of calcium carbonate:Calcium carbonate (lime stone) decomposes into calcium oxide (quick lime) and carbon dioxide when heated...