Question

The roasting of an ore of a metal usually results in conversion of the metal to the oxide, but in roasting of cinnabar, HgS, produce metallic mercury rather than an oxide of mercury. If true enter 1 else 0.

Answer 1

$HgS\to HgO\to Hg$.
Since, Hg lies much below H in electrochemical series hence, HgO is further reduced to Hg.