1
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
Four species are listed below
i. $$HCO_3^−$$
ii. $$H_3O^+$$
iii. $$HSO_4^−$$
iv. $$HSO_3F$$
Which one of the following is the correct sequence of their acid strength?
A
iv < ii < iii < I
B
ii < iii < i < iv
C
i < iii < ii < iv
D
iii < i < iv < ii
2
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
The pKa of a weak acid, HA, is 4.80. The pKb of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be
A
9.58
B
4.79
C
7.01
D
9.22
3
AIEEE 2008
MCQ (Single Correct Answer)
+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.$$K_2^3$$ = $$K_1^2$$
4
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
The first and second dissociation constants of an acid H2A are 1.0 $$\times$$ 10−5 and 5.0 $$\times$$ 10−10 respectively. The overall dissociation constant of the acid will be
A
5.0 $$\times$$ 10−5
B
5.0 $$\times$$ 1015
C
5.0 $$\times$$ 10−15
D
5.0 $$\times$$ 105
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