Cinnabar (HgS) is an ore of which metal?

Mercury

The correct answer is option 3. Mercury.

Cinnabar (\(HgS\)) is an ore of Mercury.

Cinnabar is the principal ore of mercury. It is a reddish mineral composed primarily of mercury sulfide (\(HgS\)). When heated, cinnabar decomposes to release mercury vapor, which can then be collected and processed to obtain elemental mercury. Mercury is a valuable metal used in various applications, including thermometers, barometers, electrical switches, and certain industrial processes.