MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
The major reason that phenol is a better Bronsted acid than cyclohexanol is ____________ |
| A. | it is a better proton donor |
| B. | the cyclohexyl group is an electron donating group by induction, which destabilizes the anion formed in the reaction |
| C. | phenol is able to stabilize the anion formed in the reaction by resonance |
| D. | the phenyl group is an electron withdrawing group by induction, which stabilizes the anion formed in the reaction |
| Answer» D. the phenyl group is an electron withdrawing group by induction, which stabilizes the anion formed in the reaction | |
| 2. |
What is the best reagent to convert isopropyl alcohol to isopropyl bromide? |
| A. | HBr |
| B. | SOBr2 |
| C. | Br2 |
| D. | CH3MgBr |
| Answer» C. Br2 | |
| 3. |
The reaction of carboxylic acids with alcohols catalysed by conc. H2SO4 is called __________ |
| A. | Dehydration |
| B. | Saponification |
| C. | Esterification |
| D. | Neutralization |
| Answer» D. Neutralization | |
| 4. |
THE_MAJOR_REASON_THAT_PHENOL_IS_A_BETTER_BRONSTED_ACID_THAN_CYCLOHEXANOL_IS_____________?$ |
| A. | it is a better proton donor |
| B. | the cyclohexyl group is an electron donating group by induction, which destabilizes the anion formed in the reaction |
| C. | phenol is able to stabilize the anion formed in the reaction by resonance |
| D. | the phenyl group is an electron withdrawing group by induction, which stabilizes the anion formed in the reaction |
| Answer» D. the phenyl group is an electron withdrawing group by induction, which stabilizes the anion formed in the reaction | |
| 5. |
Which of the following alcohols would be most soluble in water? |
| A. | Propanol |
| B. | Hexanol |
| C. | Pentanol |
| D. | Butanol |
| Answer» B. Hexanol | |
| 6. |
Among the following, which is least acidic? |
| A. | Phenol |
| B. | O-cresol |
| C. | p-nitrophenol |
| D. | p- chlorophenol |
| Answer» C. p-nitrophenol | |
| 7. |
The dehydration of alcohols is an example of ________ |
| A. | Bimolecular elimination/E2 reaction |
| B. | SN2 reaction |
| C. | SN1 reaction |
| D. | Unimolecular elimination/E1 reaction |
| Answer» E. | |
| 8. |
Which one is the correct order of reactivity of different types of alcohol towards hydrogen halide? |
| A. | 1° alcohol > 2° alcohol > 3° alcohol |
| B. | 2° alcohol > 1° alcohol > 3° alcohol |
| C. | 3° alcohol > 1° alcohol > 2° alcohol |
| D. | 3° alcohol > 2° alcohol > 1° alcohol |
| Answer» E. | |
| 9. |
The reaction of carboxylic acids with alcohols catalysed by conc. H2SO4 is called __________ |
| A. | Dehydration |
| B. | Saponification |
| C. | Esterification |
| D. | Neutralization |
| Answer» D. Neutralization | |
| 10. |
Secondary alcohols on catalytic dehydrogenation by Cu-Ni couple gives ___________ |
| A. | Ketone |
| B. | Aldehyde |
| C. | Carboxylic acid |
| D. | Amine |
| Answer» B. Aldehyde | |
| 11. |
Which one of the following compound is obtained by the oxidation of secondary alcohols by [O]? |
| A. | Ketone |
| B. | Aldehyde |
| C. | Ether |
| D. | Amine |
| Answer» B. Aldehyde | |
| 12. |
Which one of the following compound is obtained by the oxidation of primary alcohol with nascent oxygen? |
| A. | Alkanal |
| B. | Alkanone |
| C. | Ether |
| D. | Amine |
| Answer» B. Alkanone | |