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


13.
Sulphur is detected by reaction with
A.
Sodium nitroprusside
B.
Silver nitrate
C.
Ferric chloride
D.
Nessler’s reagent
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ANSWER :
A. Sodium nitroprusside
14.

When sulphur is detected, a purple color is observed with

A.

Sodium nitroprusside

B.

Lead acetate

C.

AgNO3

D.

BaCl2

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ANSWER :

A. Sodium nitroprusside

15.
In Lassaigne’s test, halogens are detected by formation of
A.
Colored precipitate
B.
White precipitate
C.
Red precipitate
D.
No precipitate
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ANSWER :
B. White precipitate
16.

Chlorine is detected as

A.

AgCl

B.

BaCl2

C.

NaCl

D.

NaClO4

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ANSWER :

A. AgCl

17.
Which reagent is used for halogen detection in Lassaigne’s extract?
A.
Silver nitrate
B.
Sodium carbonate
C.
Ferric chloride
D.
Potassium permanganate
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ANSWER :
A. Silver nitrate
18.
The Lassaigne’s extract is prepared by fusion with
A.
Sulphur
B.
Potassium
C.
Sodium
D.
Phosphorus
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ANSWER :
C. Sodium