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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.
theory
physical properties of acid amide
Uses Trihydric alcohols (a) It is used as antifreeze in automobile radiator. (b) It is used in the preparation of good quality of soap-hand lotions shaving creams and tooth
A metal surface is exposed to solar radiations: (1) The emitted electrons have energy less than a maximum value of energy depending upon frequency of incident radiations
In hydrogen spectrum the different lines of Lyman series are present is : (1 )UV field (2) IR field (3) Visible field (4) Far IR field Ans: UV field
The correct electronic configuration of Ti(Z= 22) atom is: (1) 1s 2 , 2s 2 , 2p 6 , 3p 6 , 4s 2 , 3d 2 , (2) 1s 2, 2s 2 , 2p 6 , 3p 6 , , 3d 4 , (3) 1s 2 , 2s
Distinguish between dry corrosion and wet corrosion. Write brief notes on dissimilar types of liquid crystals.
the reaction of ammonium chloride with sulphuric acid
Which of the following sequence is correct as per Aufbau principle: (1) 3s (2) 1s (3) 2s (4) 2s Ans: 1s
explain.
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