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Q. Show the chemical properties of Aluminium?
Aluminium has a very high affinity for oxygen; this is reflected in high exothermic heat of formation of Al203 (-1676 kJ mol-1). This allows aluminium to extract oxygen from other metal oxides, and forms the basis of Goldschmidt's aluminothermic process for Ca, Sr, Ba, Mn, Cr, Mo, etc:
3Mn02 + 4Al --------------------------------->+ 2AI2, 03 + 3Mn
Fe203 + 2Al --------------------------------->Al2, O3, + 2Fe (l)
what are the differences between positive and negative mesomeric effect
A reaction among sodium hydroxide and hydrogen chloride gas produces sodium chloride and water and a reaction of 22.85g of sodium hydroxide with 20.82g of hydrogen chloride gives o
Verify the transfer function C(s)/R(s) for the block diagram given below.
The electron pair which forms a bond between two similar non-metallic atoms will be: (1) Dissimilar shared between the two (2) By complete transfer from one atom to other
In order to find the d-orbital splitting in a square planar complex, it is easier to start with an octahedral compound where splitting patterns are known and then imagine slowly m
Write the structures of monomers used in the preparation of: a. Teflon b. PMMA
The correct order of increasing energy of atomic orbitals is: (1) 5p (2) 5p (3) 4f (4) 5p Ans: 5p
Hard magnetic material is characterized by Hard magnetic material is characterized by two substance:- a) High residual magnetic induction.. b) High coercive force
uses of potassium oxalato aluminate
Q. How can we obtain Pure alumina? Pure alumina is obtained from bauxite ore. Powdered bauxite mineral is heated in a concentrated solution of sodium hydroxide under pressure w
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