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JEEMAIN and NEET
>>
Chemistry
>>
General Principals and Processes of Isolation of Metals
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Q)
Which of the following reactions is used to estimate Copper volumetrically ?
(
a
)
2
C
u
2
+
+
4
I
−
⟶
C
u
2
I
2
+
I
2
(
b
)
2
C
u
2
+
+
2
C
N
S
−
+
S
O
2
+
2
H
2
O
⟶
C
u
2
(
C
N
S
)
2
+
H
2
S
O
4
+
2
H
+
(
c
)
2
C
u
2
+
+
4
C
N
−
⟶
C
u
2
(
C
N
)
2
+
(
C
N
)
2
(
d
)
C
u
2
+
+
4
N
H
3
⟶
[
C
u
(
N
H
3
)
4
]
2
+
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