what is chemical reaction and its type

WHAT IS A CHEMICAL REACTION? If two or more reactants react together to form a product in the prescence of heat, temperature, pressure, catalyst etc are called CHEMICAL REACTION.   TYPES OF CHEMICAL REACTIONS   COMBINTION REACTION DECOMPOSITION REACTION DISPLACEMENT REACTION DOUBLE DISPLACEMENT REACTION                COMBINATION REACTION   Such a reaction in […]

Continue Reading

STRUCTURE OF THE ATMOSPHERE OF EARTH

  LAYER HEIGHT (Km) FEATURE   Troposphere 0-18 km Containing 75% of the gases in the atmosphere. As height increases temperature decreases (about 6.5 c/km ascent). Stratosphere 18-50 km This layer contains the Ozone layer. The temperature remains fairly constant. At the upper layer, the temperature is almost 0 Celsius. Mesosphere 50-80 km This is […]

Continue Reading