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

Organic Chemistry - Organic Compounds Containing Oxygen

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


7.
In acid-catalyzed dehydration, the first step is:
A.
Protonation of alcohol
B.
Loss of water
C.
Formation of carbocation
D.
Alkene formation
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ANSWER :
A. Protonation of alcohol
8.
Which alcohol does not show dehydration?
A.
1-butanol
B.
2-propanol
C.
benzyl alcohol
D.
Methanol
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ANSWER :
D. Methanol
9.
Which alcohol forms the most stable carbocation during dehydration?
A.
1-butanol
B.
2-butanol
C.
tert-butanol
D.
methanol
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ANSWER :
C. tert-butanol
10.
Which test can differentiate primary and tertiary alcohol?
A.
Iodoform
B.
Lucas test
C.
Tollens' test
D.
Fehling’s test
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ANSWER :
B. Lucas test
11.
Lucas reagent is a mixture of:
A.
HCl + Zn
B.
HCl + ZnClâ‚‚
C.
Hâ‚‚SOâ‚„ + ZnClâ‚‚
D.
NaOH + Zn
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ANSWER :
B. HCl + ZnClâ‚‚
12.
Which compound shows positive Lucas test in 5 minutes?
A.
Methanol
B.
1-butanol
C.
2-butanol
D.
tert-butanol
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ANSWER :
C. 2-butanol