The vapour density of undecomposed N2O4 is 46. When heated, vapour density decreases to 24.5 due to its dissociation to NO2. The percent dissociation of N2O4 at the final temperature is:
(a) 87 (b) 60
(c) 40 (d) 70
Which solution will have the highest boiling point ?
(a) 1 (M) C6H12O6 solution
(b) 1 (M) NaCl solution
(c) 1 (M) BaCl2 solution
(d) 1 (M) CO(NH2)2 solution
20g of naphthoic acid (C11H8O2) dissolved in 50g of benzene (Kf=1.72 K Kg mol-1) shows a depression in freezing point of 2K. The Vant Hoff factor is?
A solute x when dissolved in solvent associates to form a pentamer. The value of van't hoff factor (i) for the solute will be:-
The Van't Haff factor of a 0.005 M aqueous solution of KCl is 1.95. The degree of ionisation of KCl is:
The van't Hoff factor [i] for a dilute aqueous solution of the strong electrolyte barium hydroxide is?
Which one of the following elctrolytes has the same value of van't Hoff's factor(i) as that of Al2(SO4)3 (if all are 100% ionised)?
At 25° C molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54 ohm1cm2mol-1 and at infinite dilution its molar conductance is 238 ohm1cm2mol-1. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is
The van't Hoff factor, i for a compound which undergoes dissociation in one solvent and association in other solvent is respectively.
(a) less than one and less than one
(b) greater than one and less than one
(c) greater than one and greater than one
(d) less than one and greater than one