1
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
In qualitative analysis, the metals of group I can be separated from other ions by precipitating them as chloride salts. A solution initially contains Ag+ and pb2+ at a concentration of 0.10 M. Aqueous HCl is added to this solution until the Cl$$-$$ concentration is 0.10 M. What will the concentrations of Ag+ and Pb2+ be at equilibrium ?

(Ksp for AgCl = 1.8 $$ \times $$ 10$$-$$10, Ksp for PbCl2 = 1.7 $$ \times $$ 10$$-$$5)
A
[Ag+] = 1.8 $$ \times $$ 10$$-$$7 M, [Pb2+] = 1.7 $$ \times $$ 10$$-$$6 M
B
[Ag+] = 1.8 $$ \times $$ 10$$-$$11 M, [Pb2+] = 8.5 $$ \times $$ 10$$-$$5 M
C
[Ag+] = 1.8 $$ \times $$ 10$$-$$9 M, [Pb2+] = 1.7 $$ \times $$ 10$$-$$3 M
D
[Ag+] = 1.8 $$ \times $$ 10$$-$$11 M, [Pb2+] = 1.7 $$ \times $$ 10$$-$$4 M
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of NH+4 is 0.20 M. If the equilibrium constant, Kb for NH3 equals 1.8 $$ \times $$ 10$$-$$5, what is the pH of this solution? (log 2.7 = 0.43)
A
9.08
B
9.43
C
11.72
D
8.73
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Which of the following is least likely to behave as Lewis base?
A
H2O
B
NH3
C
BF3
D
OH$$-$$
4
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
If pH of a saturated solution of Ba(OH)2 is 12, the value of its Ksp is
A
4.00 $$ \times $$ 10$$-$$6 M3
B
4.00 $$ \times $$ 10$$-$$7 M3
C
5.00 $$ \times $$ 10$$-$$6 M3
D
5.00$$ \times $$ 10$$-$$7 M3
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