MCQ on Alcohols, Phenols and Ethers
1. Benzenediazonium chloride on reaction with phenol in weakly basic medium gives
(a) diphenyl ether
(b) p-hydroxyazobenzene
(c) chlorobenzene
(d) Benzene
Answer:::: (b)
2. Phenol reacts with bromine in CS2 at low temperature to give
(a) m-bromophenol
(b) o-and p-bromophenol
(c) p-bromophenol
(d) 2,4,6-tribromophenol
Answer:::: (b)
3. When phenol is treated with excess bromine water it gives
(a) m-bromophenol
(b) o- and p-bromophenol
(c) 2,4-dibromophenol
(d) 2,4,6-tribromophenol
Answer:::: (d)
4. Phenol on reduction with H2 in the presence of Ni catalyst gives
(a) benzene
(b) toluene
(c) cyclohexane
(d) Cyclohexanol
Answer:::: (d)
5. Dehydration of alcohol is an example of
(a) addition reaction
(b) elimination reaction
(c) substitution reaction
(d) redox reaction
Answer:::: (b)
6. The compound obtained by the reaction of ethene with diborane followed by hydrolysis with alkaline H2O2 is
(a) ethanol
(b) propanol
(c) ethanol
(d) triethyl bromide
Answer:::: (a)
7. Which of the following is formed when phenol is exposed to air?
(a) o-Benzoquinone
(b) p-Benzoquinone
(c) Phenoquinone
(d) o-and p-Benzoquinone
Answer:::: (d)
8. Which of the following is formed when glycerol is heated with oxalic acid at 503K?
(a) Glyceric acid
(b) Acrolein
(c) Allyl alcohol
(d) Methanoic acid
Answer:::: (c)
9. The alcohol which does not react with Lucas reagent is
(a) isobutyl alcohol
(b) n-butanol
(c) tert-butyl alcohol
(d) sec-butyl alcohol
Answer:::: (b)
10. Phenol is less acidic than
(a) acetic acid
(b) p-methoxyphenol
(c) p-nitrophenol
(d) Ethanol
Answer:::: (a,c)
