General Princip...

The metal oxide which cannot be reduced to metal by carbon is _________.

Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out _______________.

Which of the following metal's oxide can be reduced by Fe as reducing agent at temperature $$T_1$$?

Which one of the above oxidation curve is wrongly presented in the given Gibbs free energy vs temperature graph ?

Lead obtained from galena ore (PbS) by air reduction or carbon reduction process contains base metal (Cu, Bi, As, Sn, Zn) as impurities. Gelatin acts as an addition agent in the electrolysis of Pb. In the presence of gelatin, Pb becomes :

(i) Metals can be recovered from their ores by chemical methods.

Pb is a very important element of carbon family. It forms a number of compounds which are very useful in industries. The process of removal of base metals (Cu, Sn, Bi, As) from lead is called:

The better reducing agent at $$7100^oC$$ is:

NaCN used in the froth flotation method for the purification of ore is:-