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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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2018
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Q)
The oxidation states of
C
r
in
[
C
r
(
H
2
O
)
6
]
C
l
3
,
[
C
r
(
C
6
H
6
)
2
]
, and
K
2
[
C
r
(
C
N
)
2
(
O
)
2
(
O
2
)
(
N
H
3
)
]
respectively are :
( A )
+
3
,
0
,
and
+
4
( B )
+
3
,
0
,
and
+
6
( C )
+
3
,
+
4
,
and
+
6
( D )
+
3
,
+
2
,
and
+
4
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