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Q. Show the Liquation in purification of metals?
Crude tin, bismuth and lead are purified by liquation. In this process, the impure metal is placed at the top of a sloping hearth maintained at a temperature slightly above the melting point of the metal. The metal melts and flows down the inclined hearth into a well leaving at the back the solid impurities.
Classification of polymers - Synthetic polymers The polymers that are prepared in the laboratories are known as synthetic polymers. These are as well described as manmade polym
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how to teach mole to students
Van der Waals repulsions Because severe van der Waals repulsions occur among the tert-butyl groups in compound A at normal bond lengths and angles, the only way for the molecu
Explain detergents? Give their scheme classification. Why are the detergents preferred over soaps?
Q. Show the solubility of double salts? The solubility of double salts of lanthanides such as 2Ln (N0 3 ).3Mg (N0 3 ) 2 .24H 2 0 and Ln2 (S0 4 ) 3 . Na 2 S0 4 .xH 2 0 increase
ClCH 2 CH 2 CH 2 COPh + Methanoic acid ----------------> CH2-(CH2)-CH2-CO-C 6 H 6
What are ferrites? Ferrites are ceramic compounds containing trivalent metal having three valence electrons, iron and oxide of divalent element i.e. metals having two free ele
what is wurtz reaction?
When β -particles are sent through a tin metal foil, most of them go straight through the foil as : (1)β -particles are much heavier than electrons (2) β -particles are po
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