1
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
2
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Calculate the pOH of a solution at 25oC that contains 1 $$ \times $$ 10$$-$$10 M of hydronium ions, i.e. H3O+.
A
4.000
B
9.000
C
1.000
D
7.000
3
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%
4
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
The hydrogen ion concentration of a 10$$-$$8 M, HCl aqueous solution at 298 K (Kw = 10$$-$$14) is
A
1.0 $$ \times $$ 10$$-$$8 M
B
1.0 $$ \times $$ 10$$-$$6 M
C
1.0525 $$ \times $$ 10$$-$$7 M
D
9.525 $$ \times $$ 10$$-$$8 M
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