MCQOPTIONS
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MCQOPTIONS
This section includes 28 Mcqs, each offering curated multiple-choice questions to sharpen your Alcohols, Phenols and Ethers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Ortho-nitrophenol is less soluble in water than, p- and m- nitrophenols because |
| A. | o-nitrophenol shows intramolecular H-bonding |
| B. | o-nitrophenol shows intermolecular H-bonding |
| C. | melting point of o-nitrophenol is lower than those of m- and p-isomers |
| D. | o-nitrophenol is more volatile in steam than those of m- and p-isomers |
| Answer» B. o-nitrophenol shows intermolecular H-bonding | |
| 2. |
The best reagent to convert pent-3-en-2-ol into pent-3-en- 2-one is |
| A. | acidic permanganate |
| B. | acidic dichromate |
| C. | chromic anhydride in glacial acetic acid |
| D. | pyridiriium chlorochromate |
| Answer» E. | |
| 3. |
Picricacid is a yellow coloured compound. Its chemical name is |
| A. | m-nitrobenzoic acid |
| B. | 2, 4, 6-trinitropheriol |
| C. | 2, 4, 6-tribromophenol |
| D. | p-nitrophenol |
| Answer» C. 2, 4, 6-tribromophenol | |
| 4. |
Phenol when treated with excess of bromine water gives a white precipitate of |
| A. | 2, 4, 6-tribromophenol |
| B. | o-bromophenol |
| C. | p-bromophenol |
| D. | bromobenzene |
| Answer» B. o-bromophenol | |
| 5. |
An alcohol X when treated with hot cone. H2SO4 gave an alkene Y with formula C4H8. This alkene on ozonolysis gives single product with molecular formula C2H4O. The alcohol is |
| A. | butan-1-ol |
| B. | butan-2-ol |
| C. | 2-methylpropan-1-ol |
| D. | 2,2-dimethylbutynal-1-oI |
| Answer» C. 2-methylpropan-1-ol | |
| 6. |
Propanone on reaction with alkyl magnesium bromide followed by hydrolysis will produce |
| A. | primary alcohol |
| B. | secondary alcohol |
| C. | tertiary alcohol |
| D. | carboxylic acid |
| Answer» D. carboxylic acid | |
| 7. |
Vapours of an alcohol X when passed over hot reduced copper, produce an alkene, the alcohol is |
| A. | primary alcohol |
| B. | secondary alcohol |
| C. | tertiary alcohol |
| D. | dihydric alcohol |
| Answer» D. dihydric alcohol | |
| 8. |
Acid catalysed dehydration of t-butanol is faster than that of n-butanol because |
| A. | tertiary carbocation is more stable than primary carbocation |
| B. | primary carbocation is more stable than tertiary carbocation |
| C. | t-butanol has a higher boiling point |
| D. | rearrangement takes place during dehydration of t- butanol |
| Answer» B. primary carbocation is more stable than tertiary carbocation | |
| 9. |
The decreasing order of boiling point of the following alcohols is |
| A. | 3-methylbuan-2-ol > 2-methylbutan-2-ol > pentan-1-ol |
| B. | Pentan-1-ol > 3-methylbutan-2-ol > 2-methylbutan-2-ol |
| C. | 2-methylbutan-2-ol > 3-methylbutan-2-ol > pentan-1-ol |
| D. | 2-methylbutan-2-ol > pental-1-ol > 3-methylbutan-2-ol |
| Answer» C. 2-methylbutan-2-ol > 3-methylbutan-2-ol > pentan-1-ol | |
| 10. |
The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is |
| A. | benzoic acid |
| B. | salicyaldehyde |
| C. | salicylic acid |
| D. | phthalic acid |
| Answer» D. phthalic acid | |
| 11. |
Benzoquinone is prepared by reaction of phenol with |
| A. | Na2Cr2O7, H2SO4 |
| B. | KMnO4, H2SO4 |
| C. | Na2CrO4,HCl |
| D. | K2MnO4, H2SO4 |
| Answer» B. KMnO4, H2SO4 | |
| 12. |
Which of the following is phenol? |
| A. | Cresol |
| B. | Catechol |
| C. | Benzenol |
| D. | All of these |
| Answer» E. | |
| 13. |
Conversion of phenol to salicyclic acid and to salicyaldehyde are known as (respectively) |
| A. | Reimer-Tiemann reaction and Kolbe s reaction |
| B. | Williamson s synthesis and Hydrobration-oxidation |
| C. | Kolbe s reaction and Williamson s synthesis |
| D. | Kolbe s reaction and Reimer-Tiemann reaction |
| Answer» E. | |
| 14. |
The major product of acid catalysed dehydration of 2-methylcyclohexanol and butan-1-ol are respectively |
| A. | 1 -methylcyclohexene andbut-1-ene |
| B. | 2-methylcyclohexene and but-2-ene |
| C. | 2-methylcyclohexene and butane |
| D. | 1-methylcyclohexene and but-2-ene |
| Answer» B. 2-methylcyclohexene and but-2-ene | |
| 15. |
Which of the following alcohol is dehydrated most easily with cone. H2SO4? |
| A. | p-O2NC6H4CH(OH)CH3 |
| B. | p-ClC6H4CH(OH)CH3 |
| C. | p-CH3OC6H4CH(OH)CH3 |
| D. | C6H5CH(OH)CH3 |
| Answer» D. C6H5CH(OH)CH3 | |
| 16. |
Tertiary butyl alcohol gives tertiary butyl chlorideon treatment with |
| A. | Conc HCl/anhydrous ZnCl3 |
| B. | KCN |
| C. | NaOCl |
| D. | Cl2 |
| Answer» B. KCN | |
| 17. |
The most suitable reagent for the conversion of RCH2OH RCHO is |
| A. | K2Cr2O7 |
| B. | CrO3 |
| C. | KMnO4 |
| D. | PCC |
| Answer» E. | |
| 18. |
The reaction between phenol and chloroform in the presence of aqueous NaOH is |
| A. | nucleophilic substitution reaction |
| B. | electrophilic addition reaction |
| C. | electrophilic substitution reaction |
| D. | nucleophilic addition reaction |
| Answer» D. nucleophilic addition reaction | |
| 19. |
Arrange the following alcohols in order of increasing reactivity towards sodium metal. (i) (CH3)3C-OH (ii) (CH3)2CH-OH (iii) CH3CH2OH |
| A. | (iii) < (ii) < (i) |
| B. | (ii) > (i) < (iii) |
| C. | (i) < (ii) < (iii) |
| D. | (iii) < (i) < (ii) |
| Answer» D. (iii) < (i) < (ii) | |
| 20. |
A compound X with the molecular formula C2H8O can be oxidised to another compound Y whose molecular formulae is C3H6O2. The compound X may be |
| A. | CH3CH2OCH3 |
| B. | CH3CH2CHO |
| C. | CH3CH2CH2OH |
| D. | CH3CHOHCH3 |
| Answer» D. CH3CHOHCH3 | |
| 21. |
What would be the reactant and reagent used to obtain 2, 4-dimenthyl pentan-3-ol? |
| A. | Propanal and propyl magnesium bromide |
| B. | 3-methylbutanal and 2-methyl magnesium iodide |
| C. | 2-dimethylpropanone and methyl magnesium odide |
| D. | 2-methylpropanal and isopropyl magnesium iodide |
| Answer» E. | |
| 22. |
Which of the following alcohols will give the most stable carbocation during dehydration? |
| A. | 2-methyl-1-propanol |
| B. | 2-methyl-2-propanol |
| C. | 1-Butanol |
| D. | 2-Butanol |
| Answer» C. 1-Butanol | |
| 23. |
1-Phenylethanol can be prepared by the reaction of benzaldehyde with |
| A. | methyl bromide |
| B. | ethyl iodide and magnesium |
| C. | methyl iodide and magnesium (Grignard reagent s) |
| D. | methyl bromide and aluminium bromide |
| Answer» D. methyl bromide and aluminium bromide | |
| 24. |
Order of esterification of alcohols are |
| A. | 3 > 1 > 2 |
| B. | 2 > 3 > 1 |
| C. | 1 > 2 > 3 |
| D. | None of these |
| Answer» D. None of these | |
| 25. |
Which of the following reagents can not, be used to oxidise primary alcohols to aldehydes? |
| A. | CrO3 in anhydrous medium |
| B. | KMnO4 in acidic medium |
| C. | Pyridinium chlorochromate |
| D. | Heat in the presence of Cu at 573 K |
| Answer» C. Pyridinium chlorochromate | |
| 26. |
One mole of ethyl acetate on tatment with an excess of LiAlH4 in dry ether and subsequent acidification produces |
| A. | 1 mole acetic acid + 1 mole ethyl alcohol |
| B. | 1 mole ethyl alcohol + 1 mole methyl alcohol |
| C. | 2 moles of ethyl alcohol |
| D. | 1 mole of 2-butanol |
| Answer» D. 1 mole of 2-butanol | |
| 27. |
Which of the following alcohols gives 2-butenc on dehydration byconc. H2SO4? |
| A. | 2-methyl propene-2-ol |
| B. | 2-methyl 1 -propanol |
| C. | Butane-2-ol |
| D. | Butane 1-ol |
| Answer» D. Butane 1-ol | |
| 28. |
What happens when tertiary butyl alcohol is passed over heated copper at 300 C? |
| A. | Secondary butyl alcohol is formed |
| B. | 2-methylpropene is formed |
| C. | 1-butene is formed |
| D. | Butanol is formed |
| Answer» C. 1-butene is formed | |