MCQ on Alcohols, Phenols and Ethers

MCQ on Alcohols, Phenols and Ethers

1. Benzenediazonium chloride on reaction with phenol in weakly basic medium gives

1. diphenyl ether
2. p-hydroxyazobenzene
3. chlorobenzene
4. Benzene

Answer: (b)

2. Phenol reacts with bromine in CS₂ at low temperature to give

1. m-bromophenol
2. o-and p-bromophenol
3. p-bromophenol
4. 2,4,6-tribromophenol

Answer: (b)

3. When phenol is treated with excess bromine water it gives

1. m-bromophenol
2. o- and p-bromophenol
3. 2,4-dibromophenol
4. 2,4,6-tribromophenol

Answer: (d)

4. Phenol on reduction with H₂ in the presence of Ni catalyst gives

1. benzene
2. toluene
3. cyclohexane
4. Cyclohexanol

Answer: (d)

5. Dehydration of alcohol is an example of

1. addition reaction
2. elimination reaction
3. substitution reaction
4. redox reaction

Answer: (b)

6. The compound obtained by the reaction of ethene with diborane followed by hydrolysis with alkaline H₂O₂ is

1. ethanol
2. propanol
3. ethanol
4. triethyl bromide

Answer: (a)

7. Which of the following is formed when phenol is exposed to air?

1. o-Benzoquinone
2. p-Benzoquinone
3. Phenoquinone
4. o-and p-Benzoquinone

Answer: (d)

8. Which of the following is formed when glycerol is heated with oxalic acid at 503K?

1. Glyceric acid
2. Acrolein
3. Allyl alcohol
4. Methanoic acid

Answer: (c)

9. The alcohol which does not react with Lucas reagent is

1. isobutyl alcohol
2. n-butanol
3. tert-butyl alcohol
4. sec-butyl alcohol

Answer: (b)

10. Phenol is less acidic than

1. acetic acid
2. p-methoxyphenol
3. p-nitrophenol
4. Ethanol

Answer: (a,c)