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


1.
Lassaigne's test is used to detect
A.
N, S, and halogens
B.
Only C and H
C.
Metallic elements
D.
None of these
😑 View Answer Rough Work Error
ANSWER :
A. N, S, and halogens
2.
In Lassaigne’s test, sodium extract is used to convert covalent elements into
A.
Ionic form
B.
Covalent form
C.
Oxides
D.
None
😑 View Answer Rough Work Error
ANSWER :
A. Ionic form
3.
Lassaigne’s test is used in
A.
Qualitative analysis
B.
Quantitative analysis
C.
Titration
D.
Gravimetric method
😑 View Answer Rough Work Error
ANSWER :
A. Qualitative analysis
4.
Extra nitrogen in organic compounds is detected as
A.
Sodium nitrite
B.
Sodium cyanide
C.
Sodium nitrate
D.
Sodium amide
😑 View Answer Rough Work Error
ANSWER :
B. Sodium cyanide
5.
The formation of blood red color during Lassaigne’s test is due to

NEET - 2019

A.
Ferrous sulphide
B.
Sodium thiocyanate
C.
Ferric thiocyanate
D.
Sodium cyanide
😑 View Answer Rough Work Error
ANSWER :
C. Ferric thiocyanate
6.
Which compound is formed when nitrogen is detected in Lassaigne’s test?
A.
Sodium cyanide
B.
Ammonia
C.
Sodium nitrate
D.
Sodium nitrite
😑 View Answer Rough Work Error
ANSWER :
A. Sodium cyanide