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Q. What is Calcinations process?
This is fie method of heating the concentrated ore in a limited supply of air to a high temperature but under the fusion temperature. In calcinations, volatile constituents of an ore are expelled. Hydrated and Hydroxide ores lose their water forming metal oxides. In case of carbonate ores, carbon dioxide is lost and metal oxides are made.
What metals combine with non-metals, the metal atom tends to: (1) Lose electrons (2) Gain electrons (3) Remain electrically neutral (4)
Chloroform
preparation of idoform
what are the reactions involved using pottasium dichromate method?
Which of the following sets of quantum numbers represent an impossible arrangement: n l m m2 (1) 3 2 - 2 (+)
Q. Example on Crystal field splitting in octahedral complexes? Here four ligands lie in one plane and the other two in a plane perpendicular to the first plane. Six ligands are
Which is the most covalent: (1) C- O (2) C- Br (3) C- S (4) C-F A
SILENT FEATURES OF ELECTROCHEMICAL SERIES.
applications of polymers in electrical and electronics
Number of unpaired electrons in the ground state of beryllium atom is: (1) 2 (2) 1 (3) 0 (4) All the above Ans: 0
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