Which of the following is not used as a medium for high temperature he

1.	Which of the following is not used as a medium for high temperature heating?
A.	owtherm
B.	ercury
C.	iquid metal (e.g. molten sodium)
D.	used salts (e.g., an eutectic mixture of 53% KNO₃, 40% NaNO₂and 7% NaNO₃)
Answer» C. iquid metal (e.g. molten sodium)

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Which of the following is not used as a medium for high temperature heating?

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