Which of the following pairs of elements cannot form an alloy

Options

A. Zn,Cu
B. Fe, Hg
C. Fe,C
D. Hg, Na

Answer

B

Explanation

Mercury has the property of dissolving nearly all metals, forming liquid or solid solutions called amalgams. It amalgamates well with gold, silver and tin, but does not dissolve iron or platinum. Presence of these may result in sickening or flouring of the mercury.