Question

photochemical decomposition of a substance is called?

Answer 1

photochemical decompostion is a chemical reaction in which a substance is broken down into simple substance by exposure of light photons .
This is usually endothermic because heat is required to break the bond .
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Answer 2

The photochemical decomposition of a substance is called photolysis.

• Photolysis is the reaction of a chemical compound either organic or inorganic which on interaction with a photon decomposes into radicals.
• Photolysis is also known as photodissociation or photodecomposition as more than one substance is produced after photon interaction with the molecule.
• Photochemical decomposition of hydrogen peroxide into water and oxygen occurs in presence of light.
• Silver chloride, silver bromide and silver iodide on photochemical decomposition give chlorine, bromine and iodine respectively.