MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Alkyl fluorides and iodides cannot be formed from Sandmeyer reaction. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Which of the following is formed as a by product of decomposition of arenediazonium fluoroborate to give fluorobenzene? |
| A. | BF3 |
| B. | BH3 |
| C. | H3BO3 |
| D. | BN |
| Answer» B. BH3 | |
| 3. |
Aryl fluoride can be obtained directly by heating which arenediazonium salt? |
| A. | Benzenediazonium fluoride |
| B. | Benzenediazonium chloride |
| C. | Benzenediazonium hydrogensulphate |
| D. | Benzenediazonium fluoroborate |
| Answer» E. | |
| 4. |
Benzenediazonium chloride on treatment with _____ gives a product which on heating forms fluorobenzene. |
| A. | hydrofluoric acid |
| B. | fluoroboric acid |
| C. | potassium fluoride |
| D. | boron trifluoride |
| Answer» C. potassium fluoride | |
| 5. |
Which of the following is not produced when C6H5N2+Br– is warmed with KI? |
| A. | C6H5I |
| B. | N2 gas |
| C. | KBr |
| D. | KNO2 |
| Answer» E. | |
| 6. |
When a diazonium salt is treated with ______ iodobenzene is formed. |
| A. | potassium iodide |
| B. | copper iodide |
| C. | ethyl iodide |
| D. | iodoform |
| Answer» B. copper iodide | |
| 7. |
Benzenediazonium bromide on Gatterman reaction with HCl does not form which of the following? |
| A. | Chlorobenzene |
| B. | Nitrogen gas |
| C. | Copper bromide |
| D. | Copper chloride |
| Answer» E. | |
| 8. |
Which of the following compounds has to be used in Gatterman reaction? |
| A. | Chloroform |
| B. | HCl |
| C. | Copper powder |
| D. | Copper chloride |
| Answer» D. Copper chloride | |
| 9. |
The yield of chlorobenzene from Sandmeyer reaction is better than that from Gatterman reaction. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Which of the following can be produced by Gatterman reaction of diazonium salts? |
| A. | Bromobenzene |
| B. | Fluorobenzene |
| C. | Nitrobenzene |
| D. | Cyanobenzene |
| Answer» B. Fluorobenzene | |
| 11. |
Identify Y in the following reaction. |
| A. | Cu2Cl2/KCN |
| B. | CuCN/KCN |
| C. | Cu2Cl2/HCN |
| D. | CuCN/HCN |
| Answer» C. Cu2Cl2/HCN | |
| 12. |
Which of the following cannot be formed from Sandmeyer reaction on benzenediazonium chloride? |
| A. | Chlorobenzene |
| B. | Bromobenzene |
| C. | Iodobenzene |
| D. | Benzonitrile |
| Answer» D. Benzonitrile | |
| 13. |
Identify the most suitable reagent for converting benzene diazonium chloride to chlorobenzene. |
| A. | CuCl2/HCl |
| B. | Cu2Cl2/HCl |
| C. | CuSO4/HCl |
| D. | CuSO2/H2SO4 |
| Answer» C. CuSO4/HCl | |
| 14. |
In reactions of diazonium salts involving the displacement of diazonium group, the nitrogen escapes as _____ |
| A. | precipitate |
| B. | liquid |
| C. | gas |
| D. | crystals |
| Answer» D. crystals | |