1
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
Presence of a nitro group in a benzene ring
A
activates the ring towards electrophilic substitution
B
renders the ring basic
C
deactivates the ring towards nucleophilic substitution
D
deactivates the ring towards electrophilic substitution
2
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
In a sautrated solution of the sparingly soluble strong electrolyte AgIO3 (Molecular mass = 283) the equilibrium which sets in is
AgIO3(s) $$\leftrightharpoons$$ Ag+(aq) + $$IO_3^-$$
If the solubility product constant Ksp of AgIO3 at a given temperature is 1.0 $$\times$$10−8, what is the mass of AgIO3 contained in 100 ml of its saturated solution?
A
28.3 × 10−2 g
B
2.83 × 10−3 g
C
1.0 × 10−7 g
D
1.0 × 10−4 g
3
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
The pKa of a weak acid (HA) is 4.5. The pOH of an aqueous buffered solution of HA in which 50% of the acid is ionized is :
A
7.0
B
4.5
C
2.5
D
9.5
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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