MCQOPTIONS
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MCQOPTIONS
| 1. |
Protective action against corrosion is provided by _________ |
| A. | CO<sub>2</sub> |
| B. | Cl<sub>2</sub> |
| C. | Cr<sub>2</sub>O<sub>3</sub> |
| D. | ZnO |
| Answer» D. ZnO | |