1
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
The enthalpy changes for the following processes are listed below :

Cl2(g) = 2Cl(g), 242.3 kJ mol–1
I2(g) = 2I(g), 151.0 kJ mol–1
ICl(g) = I(g) + Cl(g), 211.3 kJ mol–1
I2(s) = I2(g), 62.76 kJ mol–1

Given that the standard states for iodine and chlorine are I2(s) and Cl2(g), the standard enthalpy of formation for ICl(g) is :
A
–14.6 kJ mol–1
B
–16.8 kJ mol–1
C
+16.8 kJ mol–1
D
+244.8 kJ mol–1
2
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
($$\Delta H - \Delta U$$) for the formation of carbon monoxide (CO) from its elements at 298 K is : (R = 8.314 J K–1 mol–1)
A
–1238.78 J mol–1
B
1238.78 J mol–1
C
–2477.57 J mol–1
D
2477.57 J mol–1
3
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
Phosphorus pentachloride dissociates as follows, in a closed reaction vessel
PCl5 (g) $$\leftrightharpoons$$ PCl3 (g) + Cl2 (g)
If total pressure at equilibrium of the reaction mixture is P and degree of dissociation of PCl5 is x, the partial pressure of PCl3 will be
A
$$\left( {{x \over {x + 1}}} \right)P$$
B
$$\left( {{2x \over {1 - x}}} \right)P$$
C
$$\left( {{x \over {x - 1}}} \right)P$$
D
$$\left( {{x \over {1 - x}}} \right)P$$
4
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
The equilibrium constant for the reaction
SO3 (g) $$\leftrightharpoons$$ SO2 (g) + $$1 \over 2$$ O2 (g)
is Kc = 4.9 $$\times$$ 10–2. The value of Kc for the reaction
2SO2 (g) + O2 (g) $$\leftrightharpoons$$ 2SO3 (g) will be :
A
416
B
9.8 $$\times$$ 10-2
C
4.9 $$\times$$ 10-2
D
2.40 $$\times$$ 10-3
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