CBSE
Multiple Choice QuestionsFor the homogeneous reaction,
4NH3 + 5O2 4NO + 6H2O
the equilibrium constant Kc has the units
conc.+10
conc.+1
conc.-1
it is dimensionless
R - CH2 - CH2 - OH can be converted into RCH2CH2COOH by the following sequence of steps.
PBr3, KCN, H2 /Pt
PBr3, KCN, H3O+
HCN, PBr3, H3O+
KCN, H3O+
At equilibrium, the rate of dissolution of a solid solute in a volatile liquid solvent is
less than the rate of crystallisation
greater than the rate of crystallisation
equal to the rate of crytallisation
zero
Ig Ag+ + 2NH3 Ag (NH3 ; K1 = 1.7 x 107
Ag+ + Cl- AgCl; K2 = 5.4 x 109
Then, for AgCl + 2NH3 [Ag(NH3)2]+ + Cl- equilibrium constant will be
0.68 x 10-3
5.2 x 10-17
0.31 x 10-2
3.1 x 10-2
Ammonia is a Lewis base and it forms complexes with many cations. Which one of the following cations does not form a complex with ammonia?
Ag+
Cu2+
Cd2+
Pb2+
For the following equilibrium (omitting charges)
I. M + Cl MCl, Keq = 1
II. MCl + Cl MCl2, Keq = 2
III. MCl2 +Cl MCl3 ,Keq = 3
IV. M + 3Cl MCl3 , Keq = K
then relationship between K,
K =
All of the above
What percentage of -D-(+-glucopyranose is found at equilibrium in the aqueous solution?
64%
36%
100%
50%
pKa of acetic acid and pKb of ammonium hydroxide are 4.76 and 4.75 respectively. Calculate the pH of ammonium acetate solution.
6.02
7.005
8
5.602
The value of Kc for the reaction,
2A B + C is 2 x 10-3. At a given time, if the composition of reaction mixture is [A] = [B] = [C] = 3 x 10-3 M. Which is true?
The reaction will proceed in forward direction
The reaction will proceed in backward direction
The reaction will proceed in any direction
None of the above
for the rreaction,
Ag2O(s) 2Ag(s) + O2 (g) are 30.56 kJ mol-1 and 66.00 JK-1 mol-1 respectively. The temperature at which the free energy change for the reaction will be zero is
3528 K
463 K
73 K
144 K
