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1
BITSAT 2021
MCQ (Single Correct Answer)
+3
-1

The incorrect expression among the following is

A
$${{\Delta {G_{system}}} \over {\Delta {S_{total}}}} = - T$$
B
$${W_{reversible}} = - nRT\ln {{{V_f}} \over {{V_t}}}$$
C
$$\ln K = {{\Delta H^\circ - T\Delta S^\circ } \over {RT}}$$
D
$$K = {e^{ - \Delta G^\circ /RT}}$$
2
BITSAT 2020
MCQ (Single Correct Answer)
+3
-1

Which of the following statement is correct?

A
$$\Delta$$S for $${1 \over 2}$$Cl2(g) $$\to$$ Cl(g) is positive.
B
$$\Delta$$E < 0 for combustion of CH4(g) in a sealed container with rigid adiabatic system.
C
$$\Delta$$G is always zero for a reversible process in a closed system.
D
$$\Delta$$G$$^\circ$$ for an ideal gas reaction is a function of pressure.
3
BITSAT 2020
MCQ (Single Correct Answer)
+3
-1

At the top of a mountain the thermometer reads 0$$^\circ$$C and the barometer reads 710 mm Hg. At the bottom of the mountain the temperature is 30$$^\circ$$C and the pressure is 760 mm Hg. The ratio of the density of air at the top to that of the bottom is

A
1 : 1.04
B
0.4 : 1
C
1.04 : 1
D
1 : 04
4
BITSAT 2020
MCQ (Single Correct Answer)
+3
-1

The enthalpies of combustion of carbon and carbon monoxide in excess of oxygen at 298 K and constant pressure are $$-$$393.5 kJ/mol and $$-$$280.0 kj/mol respectively. The heat of formation of carbon monoxide at constant volume is

A
+ 111.7 kJ/mol
B
$$-$$ 1111.7 kJ/mol
C
$$-$$ 111.7 kJ/mol
D
$$-$$ 11.7 kJ/mol
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