Detection of Extra Elements (Nitrogen, Sulphur, Halogens) in Organic Compounds NEET Questions

Organic Chemistry - Principles of Practical Chemistry

Detection of Extra Elements (Nitrogen, Sulphur, Halogens) in Organic Compounds MCQ Questions


7.
Extra halogens are detected in the form of
A.
Silver halides
B.
Chlorides
C.
Fluorides
D.
Bromides
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ANSWER :
A. Silver halides
8.
The black precipitate of lead sulphide confirms presence of

NEET - 2020

A.
Nitrogen
B.
Sulphur
C.
Halogen
D.
Phosphorus
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ANSWER :
B. Sulphur
9.
In Lassaigne’s test, which element gives blood-red color with iron(III) ions?
A.
Nitrogen
B.
Sulphur
C.
Halogen
D.
Nitroso group
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ANSWER :
A. Nitrogen
10.
The blood-red color in nitrogen test is due to formation of
A.
Ferrocyanide
B.
Ferricyanide
C.
Ferric ferrocyanide
D.
Prussian blue
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ANSWER :
C. Ferric ferrocyanide
11.

Which ion is formed in Lassaigne’s test when nitrogen is present?

NEET - 2017

A.

NH4+

B.

NO3–

C.

CN–

D.

NO2–

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ANSWER :

C. CN–

12.
Which of the following does NOT interfere with nitrogen detection?
A.
Sulphur
B.
Carbon
C.
Chlorine
D.
Phosphorus
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ANSWER :
B. Carbon