Hydrolysis of sucrose is given by the following reaction
Sucrose + H2O Glucose + Fructose
If the equilibrium constant (Kc) is 21013 at 300 K, the value of at the same temperature will be:
1. 8.314 J mol–1 K–1300 Kln (21013)
2. 8.314 J mol–1 K–1300 Kln (31013)
3. –8.314 J mol–1 K–1300 Kln (41013)
4. –8.314 J mol–1 K–1300 Kln (21013)
For the reaction, 2Cl(g) Cl2(g), the correct option is:
1.
2.
3.
4.
What is the value of ∆H for the reaction 2Al + Cr₂O₃ → 2Cr + Al₂O₃, knowing that the enthalpies of
formation of Al₂O₃ and Cr₂O₃ are –1596 kJ and –1134 kJ, respectively?
1. | –1365 kJ | 2. | 2730 kJ |
3. | –2730 kJ | 4. | –462 kJ |
Plants and living beings are examples of:
1. Isolated system
2. Adiabatic system
3. Open system
4. Closed system
Identify the false statement among the following.
1. | Temperature is a state function. |
2. | Work is a state function. |
3. | Change in the state is completely defined when the initial and final states are specified. |
4. | Work appears at the boundary of the system. |
Assume each reaction is carried out in an open container. For which of the following reactions will
1.
2.
3.
4.
Which of the following is not an endothermic reaction?
1. Combustion of methane
2. Decomposition of water
3. Dehydrogenation of ethane or ethylene
4. Conversion of graphite to diamond
The free energy change is negative when -
1. The surroundings do no electrical work on the system.
2. The surroundings do electrical work on the system.
3. The system does electrical work on the surroundings.
4. The system does no electrical work on the surroundings.
\(\underset {-10.7 \mathrm{JK}^{-1}} {\mathrm{H}_{(a q)}^{+}+\mathrm{OH^{-}}_{(a q)}} \rightarrow \underset {+70 \mathrm{JK}^{-1} \mathrm{~mol}^{-1} } {\mathrm{H}_{2} \mathrm{O}_{(l)}} ~~ \mathrm{S}^{\circ}(298 \mathrm{~K})\)
Standard entropy change for the above reaction is:
1. 60.3 JK-1 mol-1
2. 80.7 JK-1 mol-1
3. -70 JK-1 mol-1
4. +10.7 JK-1 mol-1
The entropy change in the conversion of one mole of liquid water at 373 K to vapour at the same temperature would be: (Latent heat of vaporization of water, )
1. 105.9 JK-1mol-1
2. 107.9 JK-1mol-1
3. 108.9 JK-1mol-1
4. 109.9 JK-1mol-1