photochemical reaction molecules

Photochemical Reactions - There are many reactions that are affected by electromagnetic radiations. Chemical reactions, which occur in the presence of visible and ultraviolet light are called photochemical reactions. Photochemical..

There are many reactions that are affected by electromagnetic radiations. Chemical reactions, which occur in the presence of visible and ultraviolet light are called photochemical reactions..

Photochemical and Biosynthetic Phases - Light Phase consists of photochemical reactions which are carried out by two different photo systems, PS-I and PS-II. In the thylakoids, chlorophyll and other molecules are packed into units called photo systems. Each p..

Photochemical smog occurs due to the action of sunlight on air pollutants, generating photochemical reactions. The principal constituents of the photochemical smog are gaseous hydrocarbons (leading to ozone formation) and oxides of nitrogen (NO x ) that are ..

When pollutants like hydrocarbons and nitrogen oxides combine in the presence of sunlight, smog is formed. This is a mixture of gases and since it is formed by photochemical reactions, it is called the photochemical smog. The word 'smog' is derived from the two words ..

A chemical reaction in which molecules of a substance break down to form simpler molecules of two or more new substances is recognized as a decomposition reaction..

takes place only in the presence of sunlight. In this reaction, the light energy from the sun is absorbed by the photosynthetic pigments and is used to break down the water molecules. This is called the photolysis ('photo' is light and 'lysis' refers to break down) of water. ..

F.F. Blackman (1905) demonstrated the presence of the dark reactions for the first time. It utilises the chemical energy temporarily stored in the products of light reaction. It is also called the Calvin cycle. It is a series of reactions taking place in a cyclic mann..

Temperature and heat flow in terms of the motion of molecules (or atoms) Rate of reaction Concentration, temperature, and pressure - their effect on reaction rates Role a catalyst in reaction rates Definition and role of activation energy in a chemic..