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WhT is pollymara
Q. Show the Occurrence of the f-block element? Apart from promethium which is unstable and is found in traces in uranium ores, all the lanthanides usually occur together. Altho
What is the dipole moment of chloro-octane? Ans) There are many forms of the molecule "chloro-octane." This is due to the chlorine atom can be attached to the octane chain in va
Why Microwave performed at low temperature and low pressure
write the different units of hardness with their relationship
the uses,preparation,and the reaction
Vacancies A vacancy is a lattice position that is vacant due to the atom is missing. It is formed when the solid is formed. Vacancies are simply empty atom site.
If molecular mass and atomic mass of sulphur are 256 and 32 respectively, its atomicity is: (1) 2 (2) 8 (3 )4 ( 4)16 Ans: 8
Criteria of purity of organic compounds The purity of an organic compound can be determined by ascertaining its some physical constants such as m.p., b.p., defined gravity, re
why f elememnts kept sepertaly in periodic table
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