MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
S(universe) > 0 can also be written as _________ |
| A. | S(system) + S(surroundings) > 0 |
| B. | S(surroundings) > 0 |
| C. | S(system) |
| D. | S(system) S(surroundings) > 0 |
| Answer» B. S(surroundings) > 0 | |
| 2. |
Third law of thermodynamics is only applicable for perfectly crystalline substances. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 3. |
The entropy of the universe is always increasing is ____________ |
| A. | zeroth law of thermodynamics |
| B. | first law of thermodynamics |
| C. | second law of thermodynamics |
| D. | third law of thermodynamics |
| Answer» C. second law of thermodynamics | |
| 4. |
If the enthalpy is positive and entropy is negative, what do you understand about Gibbs free energy? |
| A. | it is positive |
| B. | negative |
| C. | may be negative |
| D. | may be positive |
| Answer» B. negative | |
| 5. |
Reaction is spontaneous if Gibbs free energy is __________ |
| A. | greater than zero |
| B. | equal to zero |
| C. | less than zero |
| D. | infinity |
| Answer» D. infinity | |
| 6. |
Which of the following relation is true between Gibbs energy, enthalpy, temperature, and entropy? |
| A. | G = H -TS |
| B. | G = H -T |
| C. | G = H -S |
| D. | G = -TS |
| Answer» B. G = H -T | |
| 7. |
Entropy is an ___________ property. |
| A. | intensive |
| B. | extensive |
| C. | neither intensive or extensive |
| D. | both intensive and extensive |
| Answer» C. neither intensive or extensive | |
| 8. |
Entropy increases for a spontaneous reaction. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 9. |
Spontaneous reactions that occur or mostly ________in nature. |
| A. | endothermic |
| B. | exothermic |
| C. | both endothermic and exothermic |
| D. | neither exothermic nor endothermic |
| Answer» C. both endothermic and exothermic | |
| 10. |
Which of the following is not a spontaneous process? |
| A. | sugar dissolves in water |
| B. | melting of iron |
| C. | rusting of iron |
| D. | evaporation of water |
| Answer» C. rusting of iron | |