Question

befine photochemical electrochemical reaction and give one example in each​

Answer 1

Photochemical reaction: The chemical reaction which proceed with the absorption of light energy are called photochemical reactions. Example: Photosynthesis in plants.

An electrochemical reaction is a process in which electrons flow between a solid electrode and substance, such as an electrolyte. This flow triggers an electric current through the electrodes, causing the reaction to liberate or absorb heat

Answer 2

Explanation:

Photochemical reaction, a chemical reaction initiated by the absorption of energy in the form of light.

Electrochemical reaction, any process either caused or accompanied by the passage of an electric current and involving in most cases the transfer of electrons between two substances—one a solid and the other a liquid.