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Structural Identification and Practical Organic Chemistry
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Estimation of elements: Lassaigne, Kjeldahl, Carius
NEET level
Single correct option
Difficulty 1 of 3
si170
In the Carius method, the sulphur of an organic compound is finally weighed as
A
BaS
B
BaSO
X
4
C
Ag
X
2
S
D
PbS
Answer: B
Sulphur is oxidised by fuming
HNO
X
3
in a sealed tube to
H
X
2
SO
X
4
, which is precipitated with
BaCl
X
2
as
BaSO
X
4
and weighed.
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