Match List - I with List - II.

	List I Electronic configuration		List II $${\Delta _i}H$$ in kJ $$mo{l^{ - 1}}$$
(a)	$$1{s^2}2{s^2}$$	(i)	801
(b)	$$1{s^2}2{s^2}2{p^4}$$	(ii)	899
(c)	$$1{s^2}2{s^2}2{p^3}$$	(iii)	1314
(d)	$$1{s^2}2{s^2}2{p^1}$$	(iv)	1402

Choose the most appropriate answer from the options given below :

Statements about heavy water are given below :

A. Heavy water is used in exchange reactions for the study of reaction mechanisms.

B. Heavy water is prepared by exhaustive electrolysis of water.

(C) Heavy water has higher boiling point than ordinary water.

(D) Viscosity of H₂O is greater than D₂O.

Choose the most appropriate answer from the options given below :

Given below are two statements :

Statement I : A mixture of chloroform and aniline can be separated by simple distillation.

Statement II : When separating aniline from a mixture of aniline and water by steam distillation aniline boils below its boiling point.

In the light of the above statements, choose the most appropriate answer from the options given below :

The presence of ozone in troposphere :