The compound that contains zero oxidation state of Fe is:

1. [Fe(CN)6]-4 2. [Fe(CN)6]-3
3. Fe(CO)5 4. All of the above.
Subtopic:  Oxidizing & Reducing Agents |
 84%
From NCERT
AIPMT - 1999
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If the oxidation numbers of A, B, and C are + 2, +5, and –2 respectively, then the possible formula of the compound is:

1. A2(BC2)2 2. A3(BC4)2
3. A2(BC3)2 4. A3(B2C)2
Subtopic:  Oxidizing & Reducing Agents |
 72%
From NCERT
AIPMT - 2000
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The oxidation states(O.S.) of sulphur in the anions SO32-, S2O42- and S2O62- follow the order:

1. S2O42-<SO32-<S2O62-

2. SO32-<S2O42-<S2O62-

3. S2O42-<S2O62-<SO32-

4. S2O62-<S2O42-<SO32-

Subtopic:  Oxidizing & Reducing Agents |
 72%
From NCERT
AIPMT - 2003
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