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. |
How the bond dissociation enthalpy changes as one goes along the series of diatomics Li2, B2, C2, N2, O2 and F2? |
| A. | Increases |
| B. | Decreases |
| C. | Increases then decreases |
| D. | Decreases then increases |
| Answer» D. Decreases then increases | |
| 2. |
Which one of the following statements best describes the enthalpy change of a reaction? |
| A. | The energy released when chemical bonds are formed during a chemical reaction |
| B. | The energy consumed when chemical bonds are broken during a chemical reaction |
| C. | The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reaction |
| D. | The increase in disorder of the system as a reaction proceeds |
| Answer» D. The increase in disorder of the system as a reaction proceeds | |
| 3. |
What will be the change in energy for the following reaction?H2(g)+F2(g) 2HF |
| A. | nGiven: To break one mole of H<sub>2</sub>, energy absorbed is 436 kJ. To break one mole of F<sub>2</sub>, energy absorbed is 158 kJ. To form one moles of HF, energy released is 568 kJ. |
| B. | 542KJ |
| C. | -542KJ |
| D. | 26 KJ |
| E. | -26 KJ |
| Answer» C. -542KJ | |