MCQOPTIONS
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MCQOPTIONS
This section includes 11 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 will be obtained by keeping ether in contact with air for a long time? |
| A. | C2H5−O−CH (CH3)−O−OH |
| B. | C2H5−OCH2−OH |
| C. | C2H5−O−C2H5OH |
| D. | CH3−O CH (CH3)−O−OH |
| Answer» B. C2H5−OCH2−OH | |
| 2. |
Which of the following is the name reaction of the given reaction? |
| A. | Wollf’s rearrangement |
| B. | Favorskii rearrangement |
| C. | Pinacol rearrangement |
| D. | Claisen rearrangement |
| Answer» E. | |
| 3. |
Which pair of products would result from the acid cleavage of tert-butyl propyl ether with excess concentrated HBr at an elevated temperature? |
| A. | tert-butyl bromide and propyl alcohol |
| B. | tert-butyl bromide and propyl bromide |
| C. | tert-butyl alcohol and propyl bromide |
| D. | 2-methyl-2-butene and propyl bromide |
| Answer» C. tert-butyl alcohol and propyl bromide | |
| 4. |
The boiling point of ethyl alcohol is much higher than that of dimethyl ether though both have the same molecular weight. Why? |
| A. | Ether is insoluble in water |
| B. | Methyl groups are attached to oxygen in ether |
| C. | Dipole moment of ethyl alcohol is less |
| D. | Ethyl alcohol shows hydrogen bonding |
| Answer» E. | |
| 5. |
What are the products when tert-butyl ethyl ether is cleaved with concentrated HI? |
| A. | iodoethane and tert-butanol |
| B. | iodoethane and 2-iodo-2-methylpropane |
| C. | ethanol and 2-iodo-2-methylpropane |
| D. | ethanol and tert-butanol |
| Answer» D. ethanol and tert-butanol | |
| 6. |
WHICH_OF_THE_FOLLOWING_WILL_BE_OBTAINED_BY_KEEPING_ETHER_IN_CONTACT_WITH_AIR_FOR_A_LONG_TIME??$ |
| A. | C<sub>2</sub>H<sub>5</sub>‚àíO‚àíCH (CH<sub>3</sub>)‚àíO‚àíOH |
| B. | C<sub>2</sub>H<sub>5</sub>‚àíOCH<sub>2</sub>‚àíOH |
| C. | C<sub>2</sub>H<sub>5</sub>‚àíO‚àíC<sub>2</sub>H<sub>5</sub>OH |
| D. | CH<sub>3</sub>‚àíO CH (CH<sub>3</sub>)‚àíO‚àíOH |
| Answer» B. C<sub>2</sub>H<sub>5</sub>‚Äö√Ñ√∂‚àö‚Ć‚àö‚â†OCH<sub>2</sub>‚Äö√Ñ√∂‚àö‚Ć‚àö‚â†OH | |
| 7. |
Select the ether among following that yields methanol as one of the products on reaction with cold hydroiodic acid. |
| A. | 1-Methoxybutane |
| B. | 1-Methoxy-2-methylpropane |
| C. | 2-Methoxy-2-methylpropane |
| D. | Methoxybenzene |
| Answer» D. Methoxybenzene | |
| 8. |
Which pair of products would result from the acid cleavage of phenyl propyl ether with excess concentrated HBr at an elevated temperature? |
| A. | Phenol and 1-propanol |
| B. | Bromobenzene and 1-propanol |
| C. | Bromobenzene and 1-bromopropane |
| D. | Phenol and 1-bromopropane |
| Answer» E. | |
| 9. |
What are the products when ethyl isopropyl ether is cleaved with concentrated HI? |
| A. | ethanol and 2-iodo-2-methylpropane |
| B. | ethanol and 2-methylpropane |
| C. | iodoethane and isopropyl alcohol |
| D. | iodoethane and 2-methylpropane |
| Answer» D. iodoethane and 2-methylpropane | |
| 10. |
Ethers may be used as solvents because they react only with which of the following reactants? |
| A. | Acids |
| B. | Bases |
| C. | Oxidising agent |
| D. | Reducing agents |
| Answer» B. Bases | |
| 11. |
An ether is more volatile than an alcohol having the same molecular formula. What is the reason for this difference? |
| A. | dipolar character of ethers |
| B. | alcohols having resonance structures |
| C. | inter-molecular hydrogen bonding in ethers |
| D. | inter-molecular hydrogen bonding in alcohols |
| Answer» E. | |