(iv) Electric furnaces : In these furnaces, electrical energy is converted into heat energy. Such furnaces are largely used where cheap power is available and very high temperatures are required and...

(iii) Zone refining of Fractional crystallisation : Elements such as Si, Ge, Ga, etc., Which are used as semi-conductors are refined by this method. Highly pure metals are obtained. The method is...

(c) Electrolytic reduction : The oxides of the highly electropositive metals like Na, K, Mg, Ca, Al, etc., cannot be reduced easily with carbon at moderate temperatures. For reduction, a very high...

Leaching : It involves the treatment of the ore with a suitable reagent as to make it soluble while impurities remain insoluble. The ore is recovered from the solution by suitable chemical method....

2. METALLURGY Electromagnetic Separation : When one component either the ore or impurity is magnetic in nature, this method can be used for separation. A magnetic separator consisting a belt...

Aldehydes and Ketones Core Points Tests to distinguish aldehydes and ketones 1. LiAlH4 2. Fehlings solution 3. Alcohol in the prsence of HCl 4. Schiff's reagent 5. Tollen's...