| 1. | Which of the following substances is both an oxidizing agent and a reducing agent? |
A. H₂O₂ | |
B. KCIO₃ | |
C. KMnO₄ | |
D. HNO₃ |
| 2. | Which of the following substances is used both as an oxidizing agent and a reducing agent? |
A. Sodium thiosulfate | |
B. sodium nitrate | |
C. sodium nitrite | |
D. sodium sulfide |
| 3. | The process associated with burning of hydrogen is |
A. hydration | |
B. degradation | |
C. oxidation | |
D. hydrogenation |
| 4. | rusting of iron is an example of |
A. oxidation | |
B. degradation | |
C. multiplication | |
D. galvanized |
| 5. | The process of conversion of Fe⁺⁺ to Fe⁺⁺ is – |
A. oxidation | |
B. degradation | |
C. Anon | |
D. nuclear reaction |
| 6. | In which the oxidation state of chlorine is +1 |
A. hypochlorous acid | |
B. Hydrochloric | |
C. zinc chloride | |
D. chlorine |
| 7. | Oxygen has positive (+Ve) oxidation number, only – |
A. in OF₂ | |
B. in Cl₂O | |
C. in H₂O | |
D. in N₂O |
| 8. | The oxidation state of Mn in K₂MnO₄ is – |
A. +2 | |
B. +7 | |
C. -2 | |
D. +6 |
| 9. | The oxidation state of Cr in K₂Cr₂O₇ is – |
A. +6 | |
B. -6 | |
C. +7 | |
D. -7 |
| 10. | The oxidation state of S in Na₂SO₄ is – |
A. +6 | |
B. +7 | |
C. +8 | |
D. +9 |