Alcohol MCQ-B.Sc. Second year (UG) course Semester Third-Organic Chemistry paper VII (Part-1)

B.Sc. Second year Undergraduate degree course Semester Third Organic Chemistry paper VII

Chapter – Alcohol

Multiple Choice questions

1. Which one of the following compound is obtained by the oxidation of primary alcohol with nascent oxygen?
a) Alkanal
b) Alkanone
c) Ether
d) Amine

Answer: (a)

2.Which one of the following compound is obtained by the oxidation of secondary alcohols by [O]?
a) Ketone
b) Aldehyde
c) Ether
d) Amine

Answer: (a)

3.Secondary alcohols on catalytic dehydrogenation by Cu-Ni couple gives ___________
a) Ketone
b) Aldehyde
c) Carboxylic acid
d) Amine

Answer: (a)

4.The reaction of carboxylic acids with alcohols catalysed by conc. H₂SO₄ is called __________
a) Dehydration
b) Saponification
c) Esterification
d) Neutralization

Answer: (c)

5.The dehydration of alcohols is an example of ________
a) Bimolecular elimination/E₂ reaction
b) SN2 reaction
c) SN1 reaction
d) Unimolecular elimination/E1 reaction

Answer: (d)

6.Which of the following alcohols would be most soluble in water?
a) Propanol
b) Hexanol
c) Pentanol
d) Butanol

Answer: (a)

7.Which of the following alcohols gives 2-butene on dehydration byconc. H₂SO₄?
a) 2-methyl propene-2-ol
b) 2-methyl 1 -propanol
c) Butane-2-ol
d) Butane 1-ol

Answer: (c)

8. 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 573⁰K

Answer: (b)

9. 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: (b)

10.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: (b)

For more questions on Alcohols

Part-1 Click here

Part-2 Click here

Part-3 Click here

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