The oxidation number of iron in Fe3O4 is

1.	The oxidation number of iron in Fe₃O₄ is
A.	+2
B.	+3
C.	8/3
D.	2/3
Answer» D. 2/3

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Match List-I (Oxidation number) with List-II (The element) ad select the correct answer using the code given below the list : <table width="100%"><tr><td></td><td>List-I (Oxidation number)</td><td></td><td>List-II(The element)</td></tr><tr><td>F.</td><td>2</td><td>1.</td><td>Oxidation number of Mn in MnO2</td></tr><tr><td>G.</td><td>3</td><td>2.</td><td>Oxidation number of S in H2S2O7</td></tr><tr><td>H.</td><td>4</td><td>3.</td><td>Oxidation number of Ca in CaO</td></tr><tr><td>J.</td><td>6</td><td>4.</td><td>Oxidation number of Al in NaAIH4</td></tr></table>Codes :<table width="40%"><tr><td></td><td>F</td><td>G</td><td>H</td><td>J</td></tr><tr><td>A.</td><td>3</td><td>4</td><td>1</td><td>2</td></tr><tr><td>B.</td><td>4</td><td>3</td><td>1</td><td>2</td></tr><tr><td>C.</td><td>3</td><td>4</td><td>2</td><td>1</td></tr><tr><td>D.</td><td>4</td><td>3</td><td>2</td><td>1</td></tr></table>
Oxidation state of Mn in acidic KMnO4 change from is :

The oxidation number of iron in Fe3O4 is

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The oxidation number of iron in Fe₃O₄ is