Multiple Choice QuestionsIn which of the following equilibrium Kc and Kp are not equal?
2NO (g) ⇌ N2 (g) + O2 (g)
SO2 (g) + NO2 (g) ⇌ SO3 (g) + NO (g)
H2 (g) + I2 (g) ⇌ 2 HI (g)
H2 (g) + I2 (g) ⇌ 2 HI (g)
In a buffer solution containing an equal concentration of B- and HB, the Kb for B- is 10-10.The pH of buffer solution is
10
7
6
6
The reaction,
2A (g) + B (g) ⇌ 3C (g) + D (g)
is begun with the concentrations of A and B both at an initial value of 1.00 M. When equilibrium is reached, the concentration of D is measured and found to be 0.25 M. The value for the equilibrium constant for this reaction is given by the expression
[(0.75)3 (0.25)] / [(1.00)2 (1.00)]
[(0.75)3 (0.25) ] / [(0.50)2(0.75)]
[(0.75)3(0.25)] / [(0.50)2(0.75)]
[(0.75)3(0.25)] / [(0.50)2(0.75)]
Which of the following molecules acts as a Lewis acid?
(CH)3B
(CH3)O
(CH3)P
(CH3)P
A.
(CH)3B
According to Lewis concept " Acids are electron acceptor and bases are electron donor" Since, electron deficient compounds also have an ability to accept electrons, these are regarded as acids.
Trimethylborane (CH)3B have incomplete octet thus, act as Lewis acid.
The ionisation constant of ammonium hydroxide is 1.77 x 10-5 at 298 K. Hydrolysis constant of ammonium chloride is
5.65 x 10-10
6.50 x 10-12
5.65 x 10-13
5.65 x 10-13
Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO3 and Conc. H2SO4.In the mixture, nitric acid acts as a/an:
reducing agent
acid
base
base
The dissociation constants for acetic acid and HCN at 25o C are 1.5 X 10-5 and 4.5 x 10-10 respectively. The equilibrium constant for the equilibrium,
CN- + CH3COOH and HCN + CH3COO-
would be
3 x 105
3.0 x 10-5
3.0 x 10-4
3.0 x 10-4
Equal volumes of three acid solutions of pH 3.4 and 5 are mixed in a vessel. What will be the H+ ion concentration in the mixture?
1.11 x 10-4 M
3.7 x 10-4 M
3.7 x 10-3 M
3.7 x 10-3 M
If the concentration of OH- ions in the reaction Fe(OH)3 (s) ⇌ Fe3+ (aq) + 3OH-(aq) is decreased by 1/4 times, then equilibrium concentration of Fe3+ will increase by
8 times
16 times
64 times
64 times
Base strength of 
is in the order of
(2) > (1) > (3)
(3) > (2) > (1)
(1) > (3)> (2)
(1) > (3)> (2)
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