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Boiling point of Hg can be altered by which alloy?

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Boiling point of Hg can be altered by which alloy?

(a) Nickel

(b) Magnesium

(c) Cadmium

(d) All of the mentioned

I had been asked this question at a job interview.

The origin of the question is Apparatus for Oxidation topic in division Oxidation of Unit Processes

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The correct option is (c) Cadmium

To elaborate: The boiling point of the mercury can be altered by introducing alloying metals such as cadmium.

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