Dr. Parul Srivastava Solutions for Chapter: Metals and Non-metals, Exercise 5: Check Your Progress

The most common metal in the earth's crust is  

For the extraction of sodium,

a) name the ore used. 

b) name the method used.

Copper is purified by electrolytic refining.
(a) Name the materials used for the electrodes.
(b) Name the electrolyte used.

An electrolytic cell consists of
(a) Positively charged cathode
(b) Negatively charged anode
(c) Positively charged anode
(d) Negatively charged cathode

Give one word for the unwanted sand and clay impurities associated with metals in their ores. (Slag/ Gangue)

Give one word for heating the ore strongly in the presence of an excess of air to liberate ${\mathrm{SO}}_2$.