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Q. Extraction of Aluminium?
Aluminium cannot be extirpated economically from the silicate minerals. Therefore bauxite is the most important ore for the extraction of alumimum, but this has many problems. Al203 is a very stable compound. It is not reduced by heating in hydrogen. On strong heating with carbon, Al203, gives the carbide, AI4,C3,. As Al203 does not melt below 2300 K, it cannot be electrolysed conveniently. However, electrolysis of a solution of A120, in fused cryolite occurs at a much lower temperature of 1100-1300 K. Thus, aluminium is extracted by electrolysis of purified alumina in fused cryolite.
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How many moles of octane must be burned to release 525.1 kcal ?
The series of elements involving the filling of 5f-orbitals is called actinoids series. They follow Ac (89) and include the fourteen elements from Th (90) and Lw (103). The chem
Question: (a) Explain why metals are mostly ductile and ceramics brittle at room temperature. (b) Describe what you understand by the following terms. Use appropriate il
copper reacts with oxygen to form two oxide X and Y .On analysis 1.535g of X yielded 1.365g of copper and 1.450g of Y yielded 1.160g of copper. [I] determine the chemical formula
explanation
Distinguish between dry corrosion and wet corrosion. Write brief notes on dissimilar types of liquid crystals.
Ciprofloxacin is used to fight bacterial infections.
Soaps and detergents Sodium and pottasium salts of fatty acids such as palmitic acid, stearic acid, oleic acid etc are called soaps, while detergents are ammonium or sulphonate
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