MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Fittig reaction results in the formation of a diphenyl. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Predict the minor product formed when chlorobenzene reacts with chloromethane in the presence of anhydrous AlCl3? |
| A. | Toluene |
| B. | m-Chlorotoluene |
| C. | o-Chlorotoluene |
| D. | p-Chlorotoluene |
| Answer» D. p-Chlorotoluene | |
| 3. |
Which is the metal involved in Wurtz-Fittig reaction? |
| A. | Iron |
| B. | Magnesium |
| C. | Aluminium |
| D. | Sodium |
| Answer» E. | |
| 4. |
Identify ‘X’ from the reaction shown. |
| A. | Dilute H2SO4 |
| B. | Concentrated H2SO4 |
| C. | Dilute HNO3 |
| D. | Concentrated HNO3 |
| Answer» C. Dilute HNO3 | |
| 5. |
What is the major product formed when chlorobenzene reacts with nitric acid in concentrated sulphuric acid? |
| A. | Nitrobenzene |
| B. | 1-Chloro-2-nitrobenzene |
| C. | 1-Chloro-3-nitrobenzene |
| D. | 1-Chloro-4-nitrobenzene |
| Answer» E. | |
| 6. |
Identify the catalyst in Friedel-Crafts acylation reaction. |
| A. | Anhydrous FeCl3 |
| B. | Anhydrous AlCl3 |
| C. | NaNO2 |
| D. | Alcoholic KOH |
| Answer» C. NaNO2 | |
| 7. |
2-Chloronitrobenzene is more reactive than chlorobenzene. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
Which of the following compounds is most easily converted to a phenol when heated with aqueous NaOH solution? |
| A. | Chlorobenzene |
| B. | 4-Chloronitrobenzene |
| C. | 2,4-Dinitrochlorobenzene |
| D. | 2,4,6-Trinitrochlorobenzene |
| Answer» E. | |
| 9. |
The C-Cl bond length in chlorobenzene is less than the C-Cl bond length in chloromethane because of the ________ |
| A. | resonance effect in haloarenes |
| B. | difference in hybridisation of carbon in C-Cl bond |
| C. | instability of phenyl cation |
| D. | possible repulsion between nucleophile and chlorobenzene |
| Answer» C. instability of phenyl cation | |
| 10. |
Compared to haloalkanes, the reactivity of haloarenes towards nucleophilic substitution reactions is _________ |
| A. | low |
| B. | high |
| C. | very high |
| D. | equal |
| Answer» B. high | |
| 11. |
What will be the product of the following reaction?2CH3CH2Br + 2Na + dry ether = ________ |
| A. | Ethane |
| B. | 1-Bromoethane |
| C. | Butane |
| D. | 1-Bromobutane |
| Answer» D. 1-Bromobutane | |
| 12. |
What is formed when ethyl magnesium bromide reacts with water? |
| A. | Grignard reagent |
| B. | Ethane |
| C. | Ethanol |
| D. | Magnesium hydroxide |
| Answer» C. Ethanol | |
| 13. |
Which of the following is the suitable medium for preparing Grignard reagents? |
| A. | Dry acetone |
| B. | Dry ether |
| C. | Concentrated HCl |
| D. | Alcoholic KOH |
| Answer» C. Concentrated HCl | |
| 14. |
How many β-carbon atoms does 2-Bromobutane have? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 15. |
What is the correct order of reactivity of haloalkanes towards β-elimination reactions? |
| A. | 1°>2°>3° |
| B. | 3°>2°>1° |
| C. | 1°>3°>2° |
| D. | 3°>1°>2° |
| Answer» C. 1°>3°>2° | |