Discuss the general characteristics of nitrogen family and justify their position in the same group. 

Discuss the characteristics of physical adsorption.

Explain the general characteristics of alkali metal.

Write down the general characteristics of organic compounds.

Discuss the general properties of VIA group elements.

Discuss the general characteristics and gradation in properties of alkaline earth metals.

Discuss the structures of oxides of nitrogen.

Discuss the general methods of preparing alkanes.

Discuss the general methods of preparation of alkyl halides.

Discuss the general characteristics of Group - 15 elements with reference to their electronic configuration, oxidation state, atomic size, ionization enthalpy and electronegativity.