Organic Compounds: Acetanilide, p-nitro Acetanilide, Aniline Yellow, Iodoform NEET Questions

Organic Chemistry - Principles of Practical Chemistry

Organic Compounds: Acetanilide, p-nitro Acetanilide, Aniline Yellow, Iodoform MCQ Questions


13.
Iodoform has a characteristic smell and color. What is it?
A.
Yellow and antiseptic
B.
White and sweet
C.
Yellow and fruity
D.
Colorless and pungent
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ANSWER :
A. Yellow and antiseptic
14.

The compound used for iodoform test must have

A.

CH3CO– or CH3CH(OH)– group

B.

CH3CHOH–COOH

C.

CH3–CH2–OH

D.

CH2OH–CHO

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ANSWER :

A. CH3CO– or CH3CH(OH)– group

15.

Iodoform test is given by compounds having

A.

CH3–CO– group

B.

CH3–CH2–OH

C.

CH3–CHO

D.

All of these

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ANSWER :

D. All of these

16.
Aniline yellow is a type of
A.
Azo dye
B.
Anthraquinone dye
C.
Indigo dye
D.
Sulfur dye
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ANSWER :
A. Azo dye
17.
Aniline yellow is prepared by coupling diazonium salt with
A.
Phenol
B.
Aniline
C.
N,N-dimethylaniline
D.
Benzene
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ANSWER :
C. N,N-dimethylaniline
18.
The coupling reaction to form aniline yellow occurs at
A.
pH ~ 5
B.
pH ~ 10
C.
pH ~ 2
D.
Neutral
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ANSWER :
B. pH ~ 10