1
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
The absolute enthalpy of neutralisation of the reaction :

Mg(O)(s) + 2HCl(aq) $$ \to $$ MgCl2(aq) + H2O(l) will be
A
$$-$$57.33 kJ mol$$-$$1
B
greater than $$-$$ 57.33 kJ mol$$-$$1
C
less than $$-$$ 57.33 kJ mol$$-$$1
D
57.33 kJ mol$$-$$1
2
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
At 25oC, the dissociation constant of a base, BOH, is 1.0 $$ \times $$ 10$$-$$12. The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be
A
1.0 $$ \times $$ 10$$-$$5 mol L$$-$$1
B
1.0 $$ \times $$ 10$$-$$6 mol L$$-$$1
C
2.0 $$ \times $$ 10$$-$$6 mol L$$-$$1
D
1.0 $$ \times $$ 10$$-$$7 mol L$$-$$1
3
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
H2S gas when passed through a solution of cations containing HCl precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because
A
presence of HCl decreases the sulphide ion concentration
B
solubility product of group II sulphides is more than that of group IV sulphates
C
presence of HCl increases the sulphide ion concentration
D
sulphides of group IV cations are unstable in HCl.
4
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
Equilibrium constants K1 and K2 for the following equilibriam:

AIPMT 2005 Chemistry - Chemical Equilibrium Question 9 English
are related as
A
K2 = 1/K12
B
K2 = K12
C
K2 = 1/K1
D
K2 = K1/2
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