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  • The p-Block Elements (Part-2)

    The molecule of ammonia is trigonal pyramidal with the nitrogen atom at the apex. It has three bond pairs and one lone pair of electrons as shown in the structure.

    Jan 21, 2013
  • The p-Block Elements (Part-1)

    Atomic sizes, ionization enthalpy, electron gain enthalpy and electro negativity are the parameters witch influence the properties of p-block elements like that of others

    Jan 21, 2013
  • General Principles and Processes of Isolation of Elements (Part-2)

    The process of metallurgy and isolation should be such that it is chemically feasible and commercially viable. Still, some general principles are common to all the extraction processes of metals.

    Jan 19, 2013
  • General Principles and Processes of Isolation of Elements (Part-1)

    A naturally occurring inorganic solid, whose chemical composition is definite, and having an  ordered atomic arrangement is called as mineral. This may seem a bit of a mouthful, but if you break it down it becomes simpler. In the same way we can define one more basic term like an ore. A type of rock that contains minerals with important elements including metals is called as ore.

    Jan 19, 2013
  • Surface Chemistry (Part-2)

    A physical adsorption process in which there are van der Waals forces of interaction between gas or liquid molecules and a solid surface. Chemisorption involves a chemical reaction between the surface and the adsorbate. It is a type of adsorption

    Jan 19, 2013
  • Surface Chemistry (Part-1)

    Process of adsorption is similar to absorption, by which a substance in a gas or liquid becomes attached to a solid. The substance can be a pollutant, called an adsorbate, which is attracted to the surface of a special solid.

    Jan 19, 2013
  • Evolution part 2 trial 2 640 X 480 256 kbps

    test file 2

    Jan 18, 2013
  • Evolution part 2 trial 480 X 360-256 kbps

    test file

    Jan 18, 2013
  • Chemical Kinetics (Part-2)

    The rate of a chemical reaction at a given temperature may depend on the concentration of one or more reactants and products. The average kinetic energy has a direct relation with absolute temperature

    Jan 18, 2013
  • Chemical Kinetics (Part-1)

    The branch of chemistry, which deals with the study of reaction rates and their mechanisms, called chemical kinetics

    Jan 18, 2013
  • Electrochemistry-(part-2)

    The potential difference between the two electrodes (anode and cathode) of a galvanic cell is termed as the cell potential. unit to measure the cell potential is volt.

    Jan 17, 2013
  • Electrochemistry-(part-1)

    The study of production of electricity from energy released during spontaneous chemical reactions and the use of electrical energy to bring about non-spontaneous chemical transformations is known as electrochemistry.

    Jan 17, 2013
  • Microbes in Human Welfare (Part 2)

    Biofertilisers are organisms to which are use full enrich the nutrient quality of the soil. Bacteria, fungi and cyanobacteria are the main sources of biofertilisers.

    Jan 16, 2013
  • Microbes in Human Welfare (Part 1)

    Microbes are present even at sites where no other life-form could possibly exist–sites such as deep inside the geysers (thermal vents) where the temperature may be as high as 1000C, deep in the soil, under the layers of snow several meters thick, and in highly acidic environments.

    Jan 16, 2013
  • Strategies for Enhancement in Food Production (Part 2)

    The high nutritive value which is found in honey is an important aspect that we used it as food and in the various medicines too. Honeybee also produces beeswax, which finds many uses in industry, such as in the preparation of cosmetics and polishes of various kinds.

    Jan 16, 2013

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