Alcohols( Identification of Primary, Secondary,...) NEET Questions

Organic Chemistry - Organic Compounds Containing Oxygen

Alcohols( Identification of Primary, Secondary,...) MCQ Questions


7.
Which of the following is NOT a secondary alcohol?
A.
CH₃–CH₂–CH(OH)–CH₃
B.
CH₃–CH(OH)–CH₃
C.
CH₃–CH₂–CH₂–OH
D.
C₆H₅–CH(OH)–CH₃
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ANSWER :
C. CH₃–CH₂–CH₂–OH
8.
Vinyl alcohol (CH₂=CH–OH) differs from allyl alcohol because in vinyl alcohol the –OH group is attached to:
A.
An sp³ hybridised carbon
B.
An sp² hybridised carbon
C.
An aromatic carbon
D.
An sp hybridised carbon
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ANSWER :
B. An sp² hybridised carbon
9.
Which test is commonly used to distinguish between primary, secondary, and tertiary alcohols?
A.
Iodoform test
B.
Fehling's test
C.
Tollens' test
D.
Lucas test
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ANSWER :
D. Lucas test
10.
In the Lucas test, the order of reactivity of alcohols (fastest to slowest) is:
A.
Tertiary > Secondary > Primary
B.
Primary > Tertiary > Secondary
C.
Secondary > Primary > Tertiary
D.
Primary > Secondary > Tertiary
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ANSWER :
A. Tertiary > Secondary > Primary
11.
An alcohol giving turbidity immediately with Lucas reagent is most likely:
A.
CH₃CH₂CH₂CH₂OH
B.
CH₃CH₂OH
C.
(CH₃)₃C–OH
D.
CH₃OH
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ANSWER :
C. (CH₃)₃C–OH
12.
Which of the following alcohols would produce turbidity with Lucas reagent only after about 5 minutes at room temperature?
A.
Methanol
B.
Butan-2-ol
C.
Butan-1-ol
D.
2-Methylpropan-2-ol
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ANSWER :
B. Butan-2-ol