In the cyanide process for the extraction of silver,sodium cyanide $(NaCN)$ is used to

Predict the physical state of the metal $M$ obtained in the following reduction reaction shown by the Ellingham diagram: $MO(s) + C(s) \rightarrow M(?) + CO(g)$.

Smelting is done in

Which one of the following is a wrong statement about cast iron?

When copper ore is mixed with silica in a reverberatory furnace,copper matte is produced. The copper matte contains . . . . . .

Aluminium is produced on a large scale by electrolysis of alumina,dissolved in fused cryolite and a little fluorspar. These two electrolytes,cryolite and fluorspar are respectively