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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.
transition elements form coloured compound. Why?
Fructose, fruit sugar (C 6 H 12 O 6 ) or ketohexose It is exist in abundance in fruits and therefore is named fruit sugar. It is as well present in cane sugar and honey with gl
Q. Calculate standard state enthalpy of the substance? Ans. To determine ΔH o f for calcium carbonate, calcium and carbon are burned in a calorimeter. Noti
The Bohr orbit radius for the hydrogen atom (n=1) is approximately 0.530 Å . The radius for the first excited state (n=2) orbit is: (1) 0.13Å
what is importance of photochemical quantum yield
Assignment
Describe the following observations: a. Lyophilic colloid is more stable than Lyophobic colloid. b. Coagulation takes place when sodium chloride solution is added to a collo
properties of atom
One step in the preparation of nicotine sulfate from tobacco is the extraction of nicotine from aqueous solution by kerosene. The table below shows equilibrium data for the distri
Which of the following represents the correct sets of the four quantum numbers of a 4d electron: (1) 4,3,2,1/2 (2) 4, 2, 1, 0 (3) 4,3,-2+1/2
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