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ENTRANCE TEST – 2009 Multiple Questions and Answers.
| 41. | The most durable metal plating on iron to protect against corrosion is: | ||
| A. | Tin plating | ||
| B. | Zinc plating | ||
| C. | Nickel plating | ||
| D. | Copper plating | ||
| 42. | Colour of the transition metal ions/ compounds is due to the electrons present in: | ||
| A. | d-orbital | ||
| B. | s-orbital | ||
| C. | p-orbital | ||
| D. | None of the above | ||
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