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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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