requirements of light reactions and chemical reactions

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) o..

Summary - Some high fat foods such as potato chips are packaged in materials that protect them from light and oxygen and the containers are flooded with nitrogen to further exclude oxygen At times, to avoid the presence of oxygen altogether, vacuum packaging is used in some processed food..

Heating is continued for 8-10 hours. During this time haematite oxidises the impurities like carbon, silicon, sulphur and phosphorus. Carbon is removed as carbon monoxide, sulphur as sulphur dioxide, silicon as silica and phosphorus is oxidised to its pentoxide. These oxides react with lime and are..

Chemical Reactions - Chemical reactions are the processes in which new substances with new properties are formed. A chemical reaction should satisfy the following conditions: There must not be either a gain or loss of matter. There must be..

There are just 26 alphabets in English language, but the number of words are innumerable. You have studied about the 115 known elements and how they are classified for systematic and comprehensive study. Thousands of compounds are born by various chemical reactions involvi..

The electrons thus released move to the zinc rod via the external circuit. The ammonia gas so produced escapes. The hydrogen ions diffuse through the porous pot and interact with MnO 2 . (The charcoal powder makes MnO 2 electrically conducting.) Therefore, These positive charges are giv..

Rates of chemical reaction depends on the inherent characteristics or nature of the reactants. That is the reason, why some reactions are fast while others are slow. For E.g., oxidation of ferrous ion by KMNO 4 (potassium permanganate) in acidic medium is fast, ..

Aldehydes and Ketones are highly reactive compounds. They undergo similar reactions because of the presence of a carbonyl functional group in both of the..

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..