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. |
What happens when a solution of benzene diazonium bromide and an aqueous solution potassium iodide are shaken together? |
| A. | Iodobenzene is formed |
| B. | Bromobenzene is formed |
| C. | A dihaloarene is formed |
| D. | No reaction |
| Answer» B. Bromobenzene is formed | |
| 2. |
Which of the following is a reagent used in the preparation of benzene diazonium chloride from aniline? |
| A. | Sodium hydroxide |
| B. | Sodium chloride |
| C. | Sodium nitrite |
| D. | Sodium nitrate |
| Answer» D. Sodium nitrate | |
| 3. |
Sandmeyer s reaction can be used to prepare fluoroarenes. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
What is the by-product formed along with the haloarene at the end of Sandmeyer s reaction? |
| A. | H<sub>2</sub>O |
| B. | HCl |
| C. | NO<sub>2</sub> |
| D. | N<sub>2</sub> |
| Answer» E. | |
| 5. |
What is the most suitable temperature for the formation of a diazonium salt from aniline? |
| A. | 0 C |
| B. | 18 C |
| C. | 37 C |
| D. | 60 C |
| Answer» B. 18 C | |
| 6. |
In the iodination of benzene, which compound causes the reduction of iodobenzene back to benzene? |
| A. | Iodic acid |
| B. | Hydrogen iodide |
| C. | Nitric acid |
| D. | Mercuric oxide |
| Answer» C. Nitric acid | |
| 7. |
The ortho and para isomers formed by electrophilic substitution of arenes can be easily separated due to the large difference in their ________ |
| A. | densities |
| B. | solubilities |
| C. | melting points |
| D. | boiling points |
| Answer» D. boiling points | |
| 8. |
When excess chlorine is used in electrophilic substitution of toluene, which of the following dichloroarenes are formed? |
| A. | ortho and meta |
| B. | ortho and para |
| C. | meta and para |
| D. | ortho, meta and para |
| Answer» C. meta and para | |
| 9. |
Which of the following are the most suitable conditions for electrophilic substitution of arenes? |
| A. | UV light and heat |
| B. | Cold and dark |
| C. | 40<sup>o</sup>C temperature and dark |
| D. | Room temperature and sunlight |
| Answer» D. Room temperature and sunlight | |
| 10. |
Which of the following cannot be a catalyst in the electrophilic substitution of arenes? |
| A. | FeCl<sub>3</sub> |
| B. | FeBr<sub>3</sub> |
| C. | NH<sub>3</sub> |
| D. | AlCl<sub>3</sub> |
| Answer» D. AlCl<sub>3</sub> | |