MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 9 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. |
What is the name of the following reaction? |
| A. | Chichibabin reaction |
| B. | Dealkylation of pyridine |
| C. | Hantzsch pyridine synthesis |
| D. | Bonnemann cyclisation |
| Answer» B. Dealkylation of pyridine | |
| 2. |
What will be the product of the following reaction? |
| A. | 3-aminopyridine |
| B. | 2-aminopyridine |
| C. | 3,5-diaminopyridine |
| D. | 2,5-diaminopyridine |
| Answer» C. 3,5-diaminopyridine | |
| 3. |
Pyridine undergoes nucleophilic substitution with excess of NaNH2 at 100℃ to give which of the following? |
| A. | 3-aminopyridine |
| B. | 2,6-diaminopyridine |
| C. | 3,5-diaminopyridine |
| D. | 2,5-diaminopyridine |
| Answer» C. 3,5-diaminopyridine | |
| 4. |
Pyridine undergoes nucleophilic substitution with NaNH2 at 100℃ to give which of the following? |
| A. | 3-aminopyridine |
| B. | 2-aminopyridine |
| C. | 3,5-diaminopyridine |
| D. | 2,5-diaminopyridine |
| Answer» C. 3,5-diaminopyridine | |
| 5. |
Electron-withdrawing groups inhibit the Chichibabin reaction. Which of the following statement is not true about this fact? |
| A. | they increase the basicity of the ring nitrogen |
| B. | these electron-withdrawing groups can also form complexes with sodium amide |
| C. | for single electron transfer pathway, altering the distribution of spin density of the intermediate radical anion |
| D. | they slow down the sorption on sodium amide |
| Answer» B. these electron-withdrawing groups can also form complexes with sodium amide | |
| 6. |
Nucleophilic substitution reaction of pyridine is most effective in which of the conditions? |
| A. | In slightly acidic conditions |
| B. | In slightly basic conditions |
| C. | In neutral medium |
| D. | No specific condition requirements |
| Answer» E. | |
| 7. |
Pyridine undergoes nucleophilic substitution with excess of NaNH2 at 100‚ÑÉ to give which of the following?$ |
| A. | 3-aminopyridine |
| B. | 2,6-diaminopyridine |
| C. | 3,5-diaminopyridine |
| D. | 2,5-diaminopyridine |
| Answer» C. 3,5-diaminopyridine | |
| 8. |
Pyridine undergoes nucleophilic substitution with NaNH2 at 100‚ÑÉ to give which of the following?$ |
| A. | 3-aminopyridine |
| B. | 2-aminopyridine |
| C. | 3,5-diaminopyridine |
| D. | 2,5-diaminopyridine |
| Answer» C. 3,5-diaminopyridine | |
| 9. |
At which position of pyridine nucleophilic substitution reaction is most preferred? |
| A. | First and third |
| B. | Second |
| C. | Third |
| D. | Second and Forth |
| Answer» E. | |