Discuss the Ramsay's method of isolation of noble gases. 

What is the order of boiling point of noble gases?

Clathrate compounds are used for transportation of noble gases.

What is the order iof ionisation enthalpy values of noble gases?

Discuss the methods of waste water treatment.

Assertion : Charcoal is used in separation of noble gases. Reason : Charcoal has porous structure.

What is the order of polarising nature of noble gases?

Valency of noble gases is zero.

Comment on the electron affinities of noble gases.

Discuss the trend in the following properties of noble gases: (i) Melting and boiling point. (ii) Ionization enthalpy. (iii) Electron affinity. (Electron gain enthalpy)

Discuss a method for the purification of impure naphthalene.