1
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
The reaction,
2A(g) + B(g) $$\rightleftharpoons$$ 3C(g) + D(g)
is begun with the concentrations of A and B both at an initial value of 1.00 M. When equilibrium is reached, the concentration of D is measuread and found to be 0.25 M. The value for the equilibrium constant for this reaction is given by the expression
A
[(0.75)3 (0.25)] $$ \div $$ [(1.00)2 (1.00)]
B
[(0.75)3 (0.25)] $$ \div $$ [(0.50)2 (0.75)]
C
[(0.75)3 (0.25)] $$ \div $$ [(0.50)2 (0.25)]
D
[(0.75)3 (0.25)] $$ \div $$ [(0.75)2 (0.25)]
2
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
The following two reactions are known

Fe2O3(s) + 3CO(g) $$ \to $$ 2Fe(s) + 3CO2(g); $$\Delta $$H = $$-$$ 26.8 kJ

FeO(s) + CO(g) $$ \to $$  Fe(s) + CO2(g); $$\Delta $$H = $$-$$ 16.5 kJ

The value of $$\Delta $$H for the following reaction

Fe2O3(s) + CO(g) $$ \to $$  2FeO(s) + CO2(g) is
A
+ 10.3 kJ
B
$$-$$ 43.3 kJ
C
$$-$$ 10.3 kJ
D
+ 6.2 kJ
3
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
For vaporization of water at 1 atmospheric pressure, the values of $$\Delta $$H and $$\Delta $$S are 40.63 kJ mol$$-$$1 and 108.8 J K$$-$$1 mol$$-$$1, respectively. The temperature when Gibb's energy change ($$\Delta $$G) for this transformation will be zero, is
A
273.4 K
B
393.4 K
C
373.4 K
D
293.4 K
4
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
Three moles of an ideal gas expanded spontaneously into vacuum. The work done will be
A
infinite
B
3 Joules
C
9 Joules
D
zero
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