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In the first step (A), ethylene and hydrogen molecules diffuse to the catalyst (Platinum) surface. In the second step (B), the reactants are chemisorbed. The pi electron of ethylene form bonds with the platinum metal, and hydrogen molecules split into hydrogen atoms that bond to the metal. Next, th..

Depending upon the extent of carbonization, coal can be classified into four types as follows: Classification of coal Type of Coal Carbon content Commonly known as Peat 11% - Lignite 38% Soft coal / brown coal Bituminous 65% Household coal Anthracite ..

A solution can be solid, liquid or a gas depending upon the physical state. The various types of solutions are: Solute Solvent Types of solutions Examples Solid Solid Solid in Solid Alloys Liquid Solid Liquid in Solid Hydrated salts Gas Solid Gas ..

Matter Mixture type Example Solid Solid mixture Iron filings and sulphur Solid Liquid mixture Common salt and water Solid Gas mixture Air entrapped in soil Liquid Gas mixture Oxygen dissolved in water Gas Gas mixtur..

Biomass is the living matter in any organism. It is the amount of living time or energy available as food for the organisms of the next trophic level. The mass of organisms in each trophic level is called the standing cro..

The neurons that conduct impulses from the receptors or sense organs to the central nervous system are called the sensory neuron..

Based on their structure and function, the neurons are classified into thr..

Variations can be classified based on the orig..

Unaltered Petrified Moulds and casts Prints fig. 5.14 - Archaeopteryx (Fossil and Restor..