1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
The ionization constant of ammonium hydroxide is 1.77 $$ \times $$ 10$$-$$5 at 298 K. Hydrolysis constant of ammonium chloride is
A
6.50 $$ \times $$ 10$$-$$12
B
5.65 $$ \times $$ 10$$-$$13
C
5.65 $$ \times $$ 10$$-$$12
D
5.65 $$ \times $$ 10$$-$$10
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Which of the following molecules acts as a Lewis acid?
A
(CH3)2O
B
(CH3)3P
C
(CH3)3N
D
(CH3)3B
3
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
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?
A
3.7 $$ \times $$ 10$$-$$3 M
B
1.11 $$ \times $$ 10$$-$$3 M
C
1.11 $$ \times $$ 10$$-$$4 M
D
3.7 $$ \times $$ 10$$-$$4 M
4
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
A weak acid, HA, has a Ka of 1.00 $$ \times $$ 10$$-$$5. If 0.100 mol of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to
A
1.00%
B
99.9%
C
0.100%
D
99.0%
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