Alcohols, Phenols and Ethers  MCQs

MCQs of Alcohols, Phenols and Ethers

Showing 81 to 90 out of 120 Questions
6 7 8 9 10 11
81.
Which one of the following on oxidation gives a ketone ?
(a) Primary alcohol
(b) Secondary alcohol
(c) Tertiary alcohol
(d) All of the above
Answer:

Option (b)

82.
n-Propyl alcohol and isopropyl alcohol can be chemically distinguished by which reagent ?
(a) PCl5
(b) Reduction
(c) Oxidation by potassium dichromate
(d) Ozonolysis
Answer:

Option (c)

83.
What is B in 3R - OH + PX3 → 3R - X + B ?
(a) Meta phosphoric acid
(b) Phosphorous acid
(c) Pyro phosphorous acid
(d) Phosphoric acid
Answer:

Option (b)

84.
Lucas test is used for _____ .
(a) aldehydes
(b) alkyl halides
(c) alcohols
(d) carboxylic acids
Answer:

Option (c)

85.
The alkane is not obtained from _____ .
(a) Hydroxylation of ethylene
(b) C2H5OH →150° CHI/Red P
(c) Butanone →150° CZn/Hg-HCl
(d) on electrolysis of the solution of sodium propionate
Answer:

Option (d)

86.
Dehydration of alcohol is an example of _____ .
(a) Redox reaction
(b) Elimination reaction
(c) Substitution reaction
(d) Addition reaction
Answer:

Option (b)

87.
What is obtained on oxidation of 2º alcohol with chromic acid ?
(a) Aldehyde
(b) Carboxylic acid
(c) Ketone
(d) Ester
Answer:

Option (c)

88.
Which of the following is used as a solvent in oxidation of alcohol by pyridinium chlorochromate ?
(a) Chloro methane
(b) Trichloro ethane
(c) Trichloro methane
(d) Dichloro methane
Answer:

Option (d)

89.
Dehydration of 3º alcohol undergoes in presence of _____ .
(a) 20% H3PO4
(b) 85% H3PO4
(c) 50% H3PO4
(d) conc. H2SO4
Answer:

Option (a)

90.
Which substance is not dihydric ?
(a) Ethylene glycol
(b) Quinol
(c) p-cresol
(d) Catechol
Answer:

Option (c)

Showing 81 to 90 out of 120 Questions
6 7 8 9 10 11