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. |
Which of the following aldehydes can produce 1o alcohols when treated with Grignard reagent? |
| A. | Methanal |
| B. | Ethanal |
| C. | Propanal |
| D. | Butanal |
| Answer» B. Ethanal | |
| 2. |
Hydrolysis of the adduct formed form the reaction of ________ with methyl magnesium bromide gives 2-Methylpropan-2-ol. |
| A. | Methanal |
| B. | Ethanal |
| C. | Propanal |
| D. | Propanone |
| Answer» E. | |
| 3. |
Esters on catalytic hydrogenation always give a mixture of two different alcohols. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Which carbonyl compound yields secondary alcohols when treated with LiAlH4? |
| A. | Aldehyde |
| B. | Ketone |
| C. | Carboxylic acid |
| D. | Ester |
| Answer» C. Carboxylic acid | |
| 5. |
What happens when an aldehyde is treated with lithium aluminium hydride? |
| A. | Primary alcohol is formed |
| B. | Secondary alcohol is formed |
| C. | Tertiary alcohol is formed |
| D. | No reaction |
| Answer» B. Secondary alcohol is formed | |
| 6. |
Propan-2-ol can be prepared form the hydroboration-oxidation of propene. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
Which of the following is not required for the conversion of trialkyl borane to an alcohol? |
| A. | Diborane |
| B. | Water |
| C. | Sodium hydroxide |
| D. | Hydrogen peroxide |
| Answer» B. Water | |
| 8. |
Which compound reacts with propene to form tripropyl borane? |
| A. | Borane |
| B. | Diborane |
| C. | Boric acid |
| D. | Sodium borohydride |
| Answer» C. Boric acid | |
| 9. |
Identify the nucleophile that attacks the carbocation in the second step of acid catalysed hydration of alkenes? |
| A. | OH<sup> </sup> |
| B. | H<sub>2</sub>O |
| C. | H<sup>+</sup> |
| D. | H<sub>3</sub>O<sup>+</sup> |
| Answer» C. H<sup>+</sup> | |
| 10. |
The first step of the acid catalysed hydration of alkenes, involves the protonation of alkene to form a carbocation by electrophilic attack of _______ |
| A. | H<sup>+</sup> |
| B. | H<sub>2</sub>O |
| C. | H<sub>3</sub>O<sup>+</sup> |
| D. | OH<sup> </sup> |
| Answer» D. OH<sup> </sup> | |
| 11. |
Propene when reacted with water in the presence of H2SO4 gives _________ |
| A. | Propan-1-ol |
| B. | Propan-2-ol |
| C. | 2-Methylpropan-1-ol |
| D. | 2-Methylpropan-2-ol |
| Answer» C. 2-Methylpropan-1-ol | |
| 12. |
Identify the catalyst in the hydration of alkenes to produce alcohols. |
| A. | HCl |
| B. | FeCl<sub>3</sub> |
| C. | Pt |
| D. | Ni |
| Answer» B. FeCl<sub>3</sub> | |
| 13. |
Which of the following process do not yield alcohols? |
| A. | Acid catalysed hydration of alkenes |
| B. | Hydroboration-oxidation of alkenes |
| C. | Reduction of aldehydes |
| D. | Free radical halogenation of alkanes |
| Answer» E. | |
| 14. |
How are alcohols prepared from haloalkanes? |
| A. | By treating with concentrated H<sub>2</sub>SO<sub>4</sub> |
| B. | By heating with aqueous NaOH |
| C. | By treating with a strong reducing agent |
| D. | By treating with Mg metal |
| Answer» C. By treating with a strong reducing agent | |