1
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
In which of the following reactions, standard reaction entropy change ($$\Delta $$So) is positive and standard Gibb's energy change ($$\Delta $$Go) decreases sharply with increasing temperature ?
A
C(graphite) + $${1 \over 2}$$O2(g) $$ \to $$ CO(g)
B
CO(g) + $${1 \over 2}$$O2(g) $$ \to $$ CO2(g)
C
Mg(s) + $${1 \over 2}$$O2(g) $$ \to $$ MgO(g)
D
$${1 \over 2}$$C(graphite) + $${1 \over 2}$$O2(g) $$ \to $$ $${1 \over 2}$$CO2(g)
2
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
Standard enthalpy of vaporisation $$\Delta $$vapHo for water at 100oC is 40.66 kJ mol$$-$$1. The internal energy of vaporisation of water at 100oC (in kJ mol$$-$$1) is
A
+37.56
B
$$-$$43.76
C
+ 43.76
D
+ 40.66
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
The enthalpy of fusion of water is 1.435 kcal/mol. The molar entropy change for the melting of ice at 0oC is
A
10.52 cal/(mol K)
B
21.04 cal/(mol K)
C
5.260 cal/(mol K)
D
0.526 cal/(mol K)
4
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
pH of a saturated solution of Ba(OH)2 is 12. The value of solubility product (Ksp) of Ba(OH)2 is
A
3.3 $$ \times $$ 10$$-$$7
B
5.0 $$ \times $$ 10$$-$$7
C
4.0 $$ \times $$ 10$$-$$6
D
5.0$$ \times $$ 10$$-$$6
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