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JEEMAIN and NEET
>>
JEEMAIN PAST PAPERS
>>
2002
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Q)
Which of the following is a redox reaction ?
( A )
N
a
C
l
+
K
N
O
3
→
N
a
N
O
3
+
K
C
l
( B )
C
a
C
2
O
4
+
2
H
C
l
→
C
a
C
l
2
+
H
2
C
2
O
4
( C )
2
K
[
A
g
(
C
N
)
2
]
+
Z
n
→
2
A
g
+
K
2
[
Z
n
(
C
N
)
4
]
( D )
C
a
(
O
H
)
2
+
2
N
H
4
C
l
→
C
a
C
l
2
+
2
N
H
3
+
2
H
2
O
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