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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
Differential extraction - Purification of organic compounds This technique is employed for the separation of an organic compound that solid or liquid from its aqueous soluti
prove berzelius hypothesis
Evaporation theory and describe advantages, disadvantages and application?
assignment on antiferromagnatism
write a short note on colour and constitution
When an electron jumps from L to K shell: (1) Energy is absorbed (2) Energy is released (3) Energy is sometimes absorbed and sometimes released (4) Energy is nei
The number of d electrons in Fe +2 (atomic number of Fe= 26 ) is not equal to that of the: (1) p-electrons in Ne (At. No.= 10) (2) s-electrons in (At. No.= 12)
The number of electrons in c l - ion is: (1) 19 (2) 20 (3) 18 (4) 35 Ans: 18
volatile liquid is placed in a open container for 15 minutes should you expect its mas to
How do impurities and temperature affect electrical resistivity of metals? Ans: Temperature effect on resistivity: Any increase in temperature of a conductor increase
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