Given below are two statements :

Statement (I) : is more polar than

Statement (II) : Boiling point of is lower than but it is more polar than .

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

Choose the incorrect trend in the atomic radii (r) of the elements.

Match List - I with List - II.

List - I (Conversion)	List - II (Reagents, Conditions used)
	(I) Warm H2O
	(II) (a) NaOH, 368K; (b) H3O+
	(III) (a) NaOH, 443K; (b) H3O+
	(IV) (a) NaOH, 623K, 300 atm; (b) H3O+

Choose the correct answer from the options given below :

Liquid A and B form an ideal solution. The vapour pressures of pure liquids A and B are 350 and 750 mm Hg respectively at the same temperature. If $x_A$ and $x_B$ are the mole fraction of A and B in solution while $y_A$ and $y_B$ are the mole fraction of A and B in vapour phase, then,