Solution:
Option (d) is the answer. Mercury and copper are both low on the reactivity range and are less reactive metals. As a result, they can be removed by heating their sulphides in air and then further heating to reduce their oxides.
Solution:
Option (d) is the answer. Mercury and copper are both low on the reactivity range and are less reactive metals. As a result, they can be removed by heating their sulphides in air and then further heating to reduce their oxides.