Alcohols, Phenols and Ether Test

Result

Alcohols, Phenols and Ether Test - 13

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Weekly Quiz Competition

Question 1
4 / -1

RCH₂CH₂OH can be converted to RCH₂CH₂COOH by the following sequence of steps

A
PBr₃ , KCN, H₃O⁺

B
PBr₃ , KCN, H₂/P⁺

C
KCN, H₃O⁺

D
HCN, PBr₃ , H₃O⁺

Solution
Question 2
4 / -1

In Lucas test an alcohol reacts immediately and gives insoluble chloride. The alcohol is

A
CH₃OH

B
CH₃CH₂OH

C
(CH₃)₂CHOH

D
(CH₃)₃COH
Question 3
4 / -1

Which one of the following will most readily be dehydrated in acidic conditions ?

A

B

C

D

Solution
Question 4
4 / -1

The —OH group of an alcohol or the —COOH group of a carboxylic acid can be replaced by —Cl using

A
phosphorus pentachloride

B
hypochlorous acid

C
chlorine

D
hydrochloric acid

Solution
Question 5
4 / -1

During dehydration of alcohols to alkenes by heating with concentrated H₂SO₄ the initiation step is

A
protonation of alcohol molecule

B
formation of carbocation

C
elimination of water

D
formation of an ester
Question 6
4 / -1

The dehydration of butan-1-ol gives

A
1-butene as the main product

B
2-butene as the main product

C
equal amounts of 1-butene and 2-butene

D
2-methyl propene

Solution
Question 7
4 / -1

Methanol cannot be dried with anhydrous CaCl₂ because

A
CaCl₂ dissolves in it

B
it is not good dehydrating agent

C
it forms a solid CaCl₂ ∙ 4CH₃ OH

D
it reacts with CH₃OH
Question 8
4 / -1

Among the following compounds which can be dehydrated very easily ?

A

B

C

D
Question 9
4 / -1

Cyclohexanol on reaction with PBr₃ in presence of pyridine gives

A
bromocyclohexene

B
bromocyclohexane

C
1-bromocyclohexanol

D
None of these
Question 10
4 / -1

A

B

C

D