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. |
Which of the following is a by product of the reaction between fluoroborate diazonium salt and sodium nitrite in the presence of copper? |
| A. | HBF<sub>4</sub> |
| B. | NaBF<sub>4</sub> |
| C. | Na<sub>3</sub>N |
| D. | NaF |
| Answer» C. Na<sub>3</sub>N | |
| 2. |
What is the most suitable temperature for the conversion of benzenediazonium fluoroborate to nitrobenzene, with sodium nitrite and copper? |
| A. | 0 C |
| B. | 10 C |
| C. | 22 C |
| D. | 40 C |
| Answer» E. | |
| 3. |
Which of the following is the most suitable reagent for converting benzenediazonium fluoroborate to nitrobenzene? |
| A. | NaNO<sub>2</sub>/HCl |
| B. | NaNO<sub>2</sub>/Cu powder |
| C. | HBF<sub>4</sub>/HNO<sub>2</sub> |
| D. | HNO<sub>3</sub>/HCl |
| Answer» C. HBF<sub>4</sub>/HNO<sub>2</sub> | |
| 4. |
Warming an aqueous solution of benzenediazonium chloride gives phenol. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Which of the following is not obtained as a product of the reaction between benzenediazonium bromide and ethanol? |
| A. | Benzene |
| B. | Nitrogen gas |
| C. | Acetic acid |
| D. | Hydrogen bromide |
| Answer» D. Hydrogen bromide | |
| 6. |
Nitrogen gas is evolved as a product of the reaction between benzenediazonium salt and ethanol. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
A diazonium salt X forms sulphuric acid as one the by product when is reacts with phosphinic acid to give benzene. Identify X . |
| A. | Benzenediazonium chloride |
| B. | Benzenediazonium bromide |
| C. | Benzenediazonium hydrogensulphate |
| D. | Benzenediazonium fluoroborate |
| Answer» D. Benzenediazonium fluoroborate | |
| 8. |
A diazonium salt, on treatment with which of the following gives benzene? |
| A. | LiAlH<sub>4</sub> |
| B. | pyridine |
| C. | CH<sub>3</sub>CH<sub>2</sub>OH |
| D. | HBF<sub>4</sub> |
| Answer» D. HBF<sub>4</sub> | |
| 9. |
When benzenediazonium chloride is treated with hypophosphorous acid, the product obtained is __________ |
| A. | phenol |
| B. | chlorobenzene |
| C. | benzene |
| D. | aniline |
| Answer» D. aniline | |
| 10. |
The complete reaction for the conversion of aniline to benzene, involving the reduction of diazonium salt, is known as _______ |
| A. | diazotisation |
| B. | deamination |
| C. | sandmeyer reaction |
| D. | gatterman reaction |
| Answer» C. sandmeyer reaction | |