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JAMB - Chemistry (1999 - No. 15)
The correct order of increasing oxidation number of the transition metal ions for the compounds K
2
Cr
2
O
7
, V
2
O
5
and KMnO
4
is
V
2
O
5
< K
2
Cr
2
O
7
< KMnO
4
K
2
Cr
2
O
7
< KMnO
4
< V
2
O
5
KMnO
4
< K
2
Cr
2
O
7
< V
2
O
5
KMnO
4
< V
2
O
5
< K
2
Cr
2
O
7
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