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| Q. |
Which of the following metal is preferred for manufacturing micro electrodes? |
| A. | Stainless steel |
| B. | Tungsten |
| C. | Iron |
| D. | Copper |
| Answer» B. Tungsten | |
| Explanation: Tungsten is preferred for constructing micro-electrodes due to its mechanical strength and its apparent inertness. Although tungsten itself is reactive, a surface layer of tungsten oxide will, in most situations, protect the metal against corrosion. | |
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