1
MCQ (Single Correct Answer)
Thermodynamics is not concerned about
A
energy changes involved in a chemical reaction
B
the extent to which a chemical reaction proceeds
C
the rate at which a reaction proceeds
D
the feasibility of a chemical reaction
2
MCQ (Single Correct Answer)
Which of the following statement is correct?
A
The presence of reacting species in a covered beaker is an example of open system.
B
There is an exchange of energy as well as matter between the system and the surroundings in a closed system.
C
The presence of reactants in a closed vessel made up of copper is an example of a closed system.
D
The presence of reactants in a thermos flask or any other closed insulated vessel is an example of a closed system.
3
MCQ (Single Correct Answer)
The state of a gas can be described by quoting the relationship between
A
pressure, volume, temperature
B
temperature, amount, pressure
C
amount, volume, temperature
D
pressure, volume, temperature, amount
4
MCQ (Single Correct Answer)
The volume of gas is reduced to half from its original volume. The specific heat will be
A
reduce to half
B
be doubled
C
remain constant
D
increase four times
5
MCQ (Single Correct Answer)
During complete combustion of one mole of butane, 2658 kJ of heat is released. The thermochemical reaction for above change is
A
$2 \mathrm{C}_4 \mathrm{H}_{10}(\mathrm{~g})+13 \mathrm{O}_2(\mathrm{~g}) \rightarrow 8 \mathrm{CO}_2(\mathrm{~g})+10 \mathrm{H}_2 \mathrm{O}(\mathrm{l}) ; \Delta_{\mathrm{c}} \mathrm{H}=-2658.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$
B
$\mathrm{C}_4 \mathrm{H}_{10}(\mathrm{~g})+\frac{13}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow 4 \mathrm{CO}_2(\mathrm{~g})+5 \mathrm{H}_2 \mathrm{O}(\mathrm{l}) ; \Delta_{\mathrm{C}} \mathrm{H}=-1329.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$
C
$\mathrm{C}_4 \mathrm{H}_{10}(\mathrm{~g})+\frac{13}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow 4 \mathrm{CO}_2(\mathrm{~g})+5 \mathrm{H}_2 \mathrm{O}(\mathrm{l}) ; \Delta_{\mathrm{C}} \mathrm{H}=-2658.0 \mathrm{~kJ} \mathrm{~mol}{ }^{-1}$
D
$\mathrm{C}_4 \mathrm{H}_{10}(\mathrm{~g})+\frac{13}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow 4 \mathrm{CO}_2(\mathrm{~g})+5 \mathrm{H}_2 \mathrm{O}(l) ; \Delta_{\mathrm{c}} H=+2658.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$