Phenols( Acidic Nature, Electrophilic Substitution Reactions...) NEET Questions

Organic Chemistry - Organic Compounds Containing Oxygen

Phenols( Acidic Nature, Electrophilic Substitution Reactions...) MCQ Questions


7.
Acidity of phenol is due to:
A.
Release of H⁺
B.
Delocalization of negative charge on O⁻
C.
Resonance of benzene ring
D.
All of these
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ANSWER :
D. All of these
8.
Phenol can be distinguished from alcohols by:
A.
Lucas test
B.
Na metal test
C.
FeCl₃ test
D.
Iodoform test
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ANSWER :
C. FeCl₃ test
9.
Which of the following will react fastest in electrophilic substitution?
A.
Phenol
B.
Anisole
C.
Benzene
D.
Nitrobenzene
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ANSWER :
A. Phenol
10.
Which reagent is used in Reimer–Tiemann reaction?
A.
CHCl₃/NaOH
B.
CHBr₃/KOH
C.
CH₄/Cl₂
D.
HCHO/HCl
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ANSWER :
A. CHCl₃/NaOH
11.
Phenol gives blue-violet colour with:
A.
NaOH
B.
FeCl₃
C.
Bromine water
D.
HNO₃
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ANSWER :
B. FeCl₃
12.
Phenol + conc. HNO₃ gives:
A.
o-nitrophenol
B.
p-nitrophenol
C.
2,4,6-trinitrophenol
D.
nitrobenzene
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ANSWER :
C. 2,4,6-trinitrophenol