Write the resonance structures of CO₃^2- and HCO₃^-.

Write reactions to justify amphoteric nature of aluminium.

What are electron deficient compounds? Are BCl₃ and SiCl₄ electron deficient species? Explain.

What is the state of hybridization of carbon in (a) CO₃^2– (b) diamond (c) graphite?

Explain the difference in properties of diamond and graphite on the basis of their structures.