‘Crystalline solids are anisotropic in nature’. What does this statement mean?

Define electrophoresis ? 

Draw the structure of XeF₂ molecule. 

The chemistry of corrosion of iron is essentially an electrochemical phenomenon. Explain the reactions occurring during the corrosion of iron in the atmosphere.

Determine the values of equilibrium constant (K_C) and  G° for the following reaction: 

State reasons for each of the following: 

The N-O bond in  is shorter than the N-O bond in 

State reasons for each of the following: 

SF₆ is kinetically an inert substance. 

State reasons for each of the following: 

(i) All the P-Cl bonds in PCl₅ molecule are not equivalent. 

(ii) Sulphur has a greater tendency for catenation than oxygen.