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Question

Calculate the oxidation number of underlined elements in the following compounds:
Na2[Fe(CN)5(NO+)]

A
-2
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B
+3
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C
+2
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D
+1
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Solution

The correct option is C +2
Let oxidation number of Fe be 'x' in Na2[Fe(CN)5](NO+)]
charge on CN=1
charge on NO+=+1
charge on co-ordination sphere=-2
x5+1=2
x=+2

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