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Test Index
JEE Main Chemistry Class 11 Organic Chemistry Some Basic Principles and Techniques 2 Questions
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© examsnet.com
Question : 3
Total: 100
Match List I with List II
List I
Element detected
List II
Reagent used Product formed
A
Nitrogen
I.
Na
2
[
Fe
(
CN
)
5
NO
]
B
Sulphur
II.
AgNO
3
C
Phosphorous
III.
Fe
4
[
Fe
(
CN
)
6
]
3
D
Halogen
IV.
(
NH
4
)
2
MoO
4
Choose the correct answer from the options given below:
[6-Apr-2023 shift 1]
A-II, B-IV, C-I, D-III
A-IV, B-II, C-I, D-III
A-II, B-I, C-IV, D-III
A-III, B-I, C-IV, D-II
Validate
Solution:
Nitrogen detection by lassaigne's method
Na
+
C
+
N
→
NaCN
6
NaCN
+
FeSO
4
→
Na
4
[
Fe
(
CN
)
6
]
+
Na
2
SO
4
Na
4
[
Fe
(
CN
)
6
]
+
Fe
3
+
→
Fe
4
[
Fe
(
CN
)
6
]
3
(
Prussian
blue
)
Sulphur detection by Sodium nitroprusside
Na
2
[
Fe
(
CN
)
5
NO
]
+
Na
2
S
→
Na
4
[
Fe
(
CN
)
5
NOS
]
[
Purple
]
Phosphorus detection by ammonium molybdate
Na
3
PO
4
+
3
HNO
3
→
H
3
PO
4
+
3
NaNO
3
H
3
PO
4
+
12
(
NH
4
)
2
MoO
4
+
21
HNO
3
→
(
NH
4
)
3
PO
4
⋅
12
MoO
3
(
canary
yellow
)
+
21
NH
4
NO
3
+
12
H
2
O
Halogen give specific coloured ppt with
AgNO
3
(
aq
)
NaCl
+
AgNO
3
(
aq
)
→
AgCl
+
NaNO
3
(
White
)
NaBr
+
AgNO
3
(
aq
)
→
AgBr
+
NaNO
3
(
Pale
yellow
)
NaI
+
AgNO
3
(
aq
)
→
AgI
+
NaNO
3
(
Yellow
)
© examsnet.com
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