Physical Chemistry Answers

In given table
Salt pH
NH4CN (A)
KCN 8
Image not present (http://www.onlinetestseries.in/data/images/common/papers/partners/32/1179/image143.png) (B)
The value of (A) and (B) is respectively :-
(1) 2, 7
(2) 7.2, 4
(3) 7, 7
(4) 6.8, 9

Au(s) (http://www.onlinetestseries.in/data/images/common/papers/partners/32/1180/image151.png) Au(ℓ)
above equilibrium is favoured at :-
(1) High pressure, low temperature
(2) High pressure, high temperature
(3) Low pressure, high temperature
(4) Low pressure, low temperature

An electrolyte AB undergoes 50% dissociation and 50% dimerisation in solution then van't Hoff factor
(i) would be
(1) 1.25
(2) 1
(3) 0.90
(4) 1.50

Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?
(1) [Cr(NH3)6]3+
(2) [Co(NH3)6]3+
(3) [Ni(NH3)6]2+
(4) [Zn(NH3)6]2+

Electron in hydrogen atom first jumps from third excited state to seconds excited state and then from second excited to the first excited state. The ration of the wavelengths λ1 : λ2 emitted in the two cases :
(1) 27 / 5
(2) 20 / 7
(3) 7 / 5
(4) 27 / 20

Example of lyophillic colloid is

Fe(OH)3 sol
gelatine sol
gold sol
Ag sol

The term used to dispersed out from disperse system is

coagulation
precipitation
peptisation
salting in

Milk is colloidal in which

water is dispersed in fat
fat is dispersed in water
fat and water are dispersed in each other
fat is disolved in water

Following solution are mixed to prepare buffer solution having pH>7

pH of 10^-8 M H2SO4 is...