1
JEE Main 2015 (Offline)
MCQ (Single Correct Answer)
+4
-1
The following reaction is performed at 298 K
2NO(g) + O2 (g) $$\leftrightharpoons$$ 2NO2 (g)
The standard free energy of formation of NO(g) is 86.6 kJ/mol at 298 K. What is the standard free energy of formation of NO2(g) at 298 K? (KP = 1.6 × 1012)
A
86600 + R(298) ln(1.6 $$\times$$ 1012)
B
86600 - $$ln (1.6 \times 10^{12}) \over R (298)$$
C
0.5[2×86,600 – R(298) ln(1.6×1012)]
D
R(298) ln(1.6×1012) – 86600
2
JEE Main 2014 (Offline)
MCQ (Single Correct Answer)
+4
-1
For complete combustion of ethanol, C2H5OH(l) + 3O2(g) $$\to$$ 2CO2(g) + 3H2O(l) the amount of heat produced as measured in bomb calorimeter, is 1364.47 kJ mol–1 at 25oC. Assuming ideality the Enthalpy of combustion, $$\Delta _CH$$, for the reaction will be : (R = 8.314 kJ mol–1)
A
–1460.50 kJ mol–1
B
– 1350.50 kJ mol–1
C
– 1366.95 kJ mol–1
D
– 1361.95 kJ mol–1
3
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 37.0oC. As it does so, it absorbs 208J of heat. The values of q and w for the process will be :
(R = 8.314 J/mol K) ( l n 7.5 = 2.01)
A
q = – 208 J, w = – 208 J
B
q = – 208 J, w = + 208 J
C
q = + 208 J, w = + 208 J
D
q = + 208 J, w = – 208 J
4
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
The incorrect expression among the following is :
A
$${{\Delta {G_{system}}} \over {\Delta {S_{total}}}} = - T$$
B
In isothermal process $${w_{reversible}}$$ = $$- nRT\,\ln \,{{{V_f}} \over {{V_i}}}$$
C
In $$K\, = {{\Delta {H^o} - T\Delta {S^o}} \over {RT}}$$
D
$$K\, = \,{e^{ - \Delta {G^o}/RT}}$$
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