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VITEEE 2014 Solved Paper
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© examsnet.com
Question : 41
Total: 120
The sodium extract of an organic compound on acidification with acetic acid and addition of lead acetate solution gives a black precipitate. The organic compound contains
nitrogen
halogen
sulphur
phosphorus
Validate
Solution:
The organic compounds containing sulphur when react with sodium metal give
N
a
2
S
. The
N
a
2
S
when react with lead acetate forms black ppt. of PbS.
N
a
2
S
+
(
C
H
3
C
O
O
)
2
P
b
→
P
b
S
Black
ppt
+
2
C
H
3
C
O
O
N
a
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