1
AIEEE 2011
+4
-1
A vessel at 1000 K contains CO2 with a pressure of 0.5 atm. Some of the CO2 is converted into CO on the addition of graphite. If the total pressure at equilibrium is 0.8 atm, the value of K is :
A
3 atm
B
0.3 atm
C
0.18 atm
D
1.8 atm
2
AIEEE 2010
+4
-1
In aqueous solution the ionization constants for carbonic acid are
K1 = 4.2 x 10–7 and K2 = 4.8 x 10–11
Select the correct statement for a saturated 0.034 M solution of the carbonic acid.
A
The concentration of $$CO_3^{2−}$$ is 0.034 M.
B
The concentration of $$CO_3^{2−}$$ is greater than that of $$HCO_3^{−}$$
C
The concentration of H+ and $$HCO_3^−$$ are approximately equal.
D
The concentration of H+ is double that of $$CO_3^−$$.
3
AIEEE 2008
+4
-1
The equilibrium constants KP1 and KP2 for the reactions X $$\leftrightharpoons$$ 2Y and Z $$\leftrightharpoons$$ P + Q, respectively are in the ratio of 1 : 9. If the degree of dissociation of X and Z be equal then the ratio of total pressure at these equilibria is :
A
1 : 36
B
1 : 1
C
1 : 3
D
1 : 9
4
AIEEE 2008
+4
-1
For the following three reactions a, b and c, equilibrium constants are given:
a. CO (g) + H2O (g) $$\leftrightharpoons$$ CO2(g) + H2 (g) ; K1
b. CH4 (g) + H2O (g) $$\leftrightharpoons$$ CO(g) + 3H2 (g) ; K2
c. CH4 (g) + 2H2O (g) $$\leftrightharpoons$$ CO2(g) + 4H2 (g) ; K3
A
$${K_1}\sqrt {{K_2}} = {K_3}$$
B
K2K3 = K1
C
K3 = K1K2
D
K3.$$K_2^3$$ = $$K_1^2$$
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