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Theories of origin of petroleum : Theories should describe the following characteristics related with petroleum,
Its association along with brine or sodium chloride solution. The presence of nitrogen and sulphur elements in it. The presence of haemin and chlorophyll in it. It is optically active procedure. Three very significant theories are as follows.
(a) Inorganic theory or Mendeleeff's carbide theory
(b) Organic theory or Engler's theory
(c) Modern theory
240 g of water at 20 degree C are mixed with a sample of iron at 500 degree C. The final temperature of the system is 42 degree C. Find the mass of the iron sample
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PHOSPHORUS, ARSENIC AND ANTIMONY The bigger elements in the same group (15) as nitrogen are usually known as 'pnictogens' and their compounds with metals as 'pnictides'. Althoug
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