Question

Chemical changes initiated by light are called :

• A. photochemical changes
• B. spectroscopic changes
• C. periodic changes
• D. electrochemical changes

Answer 1

The correct option is A photochemical changes

Photochemical changes involve chemical reactions initiated by the absorption of energy in the form of light. The consequence of molecules absorbing light is the creation of the transient states whose chemical and physical properties differ greatly from the original molecules.
Examples of photochemical reactions: Photosynthesis.