MCQOPTIONS
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MCQOPTIONS
This section includes 13 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. |
Which of the following reactant gives the best method of preparation of alkyl halides when reacts with alcohol? |
| A. | Zn/HCl |
| B. | PCl5 |
| C. | SOCl2/ Pyridine |
| D. | PCl3 |
| Answer» D. PCl3 | |
| 2. |
Which of the following is not the method of preparation of alkyl halide? |
| A. | Darzen’s method |
| B. | Halogenation of alkene |
| C. | Addition of HX on alkenes |
| D. | Hydration of alkene |
| Answer» E. | |
| 3. |
Which of the following halide can give best SN2 reaction? |
| A. | Primary alkyl halide |
| B. | Tertiary alkyl halide |
| C. | Secondary alkyl halide |
| D. | All can give SN2 reaction at same rate |
| Answer» B. Tertiary alkyl halide | |
| 4. |
WHICH_OF_THE_FOLLOWING_REACTANT_GIVES_THE_BEST_METHOD_OF_PREPARATION_OF_ALKYL_HALIDES_WHEN_REACTS_WITH_ALCOHOL??$ |
| A. | Zn/HCl |
| B. | PCl<sub>5</sub> |
| C. | SOCl<sub>2</sub>/ Pyridine |
| D. | PCl<sub>3</sub> |
| Answer» D. PCl<sub>3</sub> | |
| 5. |
WHICH_OF_THE_FOLLOWING_IS_NOT_THE_METHOD_OF_PREPARATION_OF_ALKYL_HALIDE??$ |
| A. | Darzen’s method |
| B. | Halogenation of alkene |
| C. | Addition of HX on alkenes |
| D. | Hydration of alkene |
| Answer» E. | |
| 6. |
In primary alkyl halides, carbon attached to the halogen atom is further attached to how many carbon atoms? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 7. |
Why alkyl halides are considered to be very reactive compounds towards nucleophile? |
| A. | they have an electrophilic carbon & a bad leaving group |
| B. | they have a nucleophilic carbon & a good leaving group |
| C. | they have an electrophilic carbon |
| D. | they have an electrophilic carbon & a good leaving group |
| Answer» E. | |
| 8. |
Which of the following halide can give best SN2 reaction? |
| A. | Primary alkyl halide |
| B. | Tertiary alkyl halide |
| C. | Secondary alkyl halide |
| D. | All can give S<sub>N</sub>2 reaction at same rate |
| Answer» B. Tertiary alkyl halide | |
| 9. |
When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed? |
| A. | 2 moles of ethane |
| B. | 1 moles of ethane |
| C. | 2 moles of butane |
| D. | 1 moles of butane |
| Answer» E. | |
| 10. |
Which alkyl halide out of the following may follow both SN1 and SN2 mechanism? |
| A. | CH<sub>3</sub>-X |
| B. | (CH<sub>3</sub>)<sub>2</sub>CH-X |
| C. | (CH<sub>3</sub>)<sub>3</sub>C-X |
| D. | (CH<sub>3</sub>)<sub>3</sub>C-CH<sub>2</sub>-X |
| Answer» C. (CH<sub>3</sub>)<sub>3</sub>C-X | |
| 11. |
When ethyl chloride reacts with nascent hydrogen, what is the formed product? |
| A. | Methane |
| B. | Propane |
| C. | Butane |
| D. | Ethane |
| Answer» E. | |
| 12. |
Which alkyl halide has the highest reactivity for a particular alkyl group? |
| A. | R-F |
| B. | R-Cl |
| C. | R-I |
| D. | R-Br |
| Answer» D. R-Br | |
| 13. |
Which C-X bond has the highest bond energy per mole? |
| A. | C-Br |
| B. | C-Cl |
| C. | C-F |
| D. | C-I |
| Answer» D. C-I | |