Chemistry - Complete d-block Question with Solution | TestHub

An alloy is a homogeneous mixture of two or more metals, or a metal and a non-metal.

$\text{Na}$ and $\text{Hg}$ form sodium amalgam, which is an alloy.

$\text{Cu}$ and $\text{Zn}$ form brass, which is an alloy.

$\text{Fe}$ and $\text{C}$ form steel, which is an interstitial alloy.

$\text{Hg}$ and $\text{Fe}$ do not form an alloy (amalgam). Iron does not dissolve in mercury, which is why mercury is often stored and transported in iron containers.

Answer: $\text{Hg, Fe}$