Question

The chemical reactions which proceed with the absorption of light energy are called \\_\\_\\_\\_\\_\\_\\_\\_\\_ reactions

Answer 1

Hint : A chemical reaction which is initiated by the absorption of energy in the form of light and results in certain products is called a photochemical reaction. If light shines on a molecule, it goes to an excited state and this process is known as photo excitation.

Complete Step By Step Answer:
The two laws of photochemical reactions are as follows:
Grotthuss-Draper Law: This law states that for a chemical reaction to take place, a molecule must absorb light.
Stark-Einstein Law: This law states that only one molecule is activated for a subsequent reaction for each photon of light absorbed by a molecule.
A photochemical reaction is performed by the process of photolysis. The consequence of light absorption is a primary photochemical reaction and the secondary reactions are termed subsequent chemical shifts. Photochemical reactions are caused in the form of light by the absorption of heat. The consequence of the absorbing light of molecules is the development of transient excited states with chemical and physical properties that differ from the original molecules.

Note :
The majority of processes seen in nature are photochemical reactions. One of the most important photochemical processes is photosynthesis. In the process of photosynthesis, solar energy is absorbed and is utilized to convert carbon dioxide present in the atmosphere into carbohydrates in the presence of water. The reaction is shown below:
$6C{O_2} + 6{H_2}O \to {C_6}{H_{12}}{O_6} + 6{O_2}$
Using the process of photosynthesis, plants convert the sunlight into chemical energy and then form carbohydrates using water and carbon dioxide and releases oxygen as a by-product of the reaction.