Write the principle of a capacitor.

Write the principles of manufacture of sulphuric acid by contact process ? What happens when Conc. H_2SO_4 reacts with sodium bromide

Write the principle of preparation of Neoprene.

Write the principle of extraction of ' Zn from its sulphide ore.

Write the principle of preparation of bakelite. Give its two uses.

Write the principle of preparation and two uses of the following : (ii) Orthoboric Acid (iii) Diborane

Describe the principle of a refrigerator.

Write the principle of the following methods : (i) Vapour phase refining (ii) Liquation

Define capacitance of a capacitor. write its S.I. unit.

State the principle of the conservation of charge.

What is the principle of super position?