MCQOPTIONS
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MCQOPTIONS
This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Organic Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is the slow, low-temperature, flameless form of combustion, sustained by the heat evolved when oxygen directly attacks the surface of a condensed-phase fuel? |
| A. | Rapid combustion |
| B. | Turbulent combustion |
| C. | Spontaneous combustion |
| D. | Smouldering |
| Answer» E. | |
| 2. |
The value H transition of C (graphite) C (diamond) is 1.9 kJ/mol at 25 entropy of graphite is higher than entropy of diamond. This implies that? |
| A. | C(diamond) is more thermodynamically stable then C (graphite) at 25 |
| B. | C(graphite) is more thermodynamically stable than C (diamond) at 25 |
| C. | diamond will provide more heat on complete combustion at 25 |
| D. | G<sub>transition</sub> of C (diamond) C (graphite) is -ve |
| Answer» E. | |
| 3. |
Equal volumes of C2H2 & H2 are combusted under identical condition. What will be the ratio of heat evolved for C2H2 and H2?H2 (g) + 1/2 O2(g) H2O(g), H=-241.8 KJ |
| A. | nC<sub>2</sub>H<sub>2</sub> (g) + 5/2 O<sub>2</sub>(g) CO<sub>2</sub>(g) + H<sub>2</sub>O(g), H=-1300 KJ |
| B. | 5.37/1 |
| C. | 1/5.37 |
| D. | 1/1 |
| E. | 2.8/6.1 |
| Answer» C. 1/5.37 | |