Question

Cinnabar is the ore of:
A.Zn
B.Cd
C.Hg
D.Ag

Answer 1

Hint: To answer this question, you must recall the ores of various metals. Ores are substances that consist of minerals and metals in sufficient amounts. Cinnabar is a bright red coloured ore and is toxic. The metal is also found in liquid state.

Complete answer:
Cinnabar is a toxic ore composed of mercury sulphide. Cinnabar is the only important ore of mercury and the most common source of the metal.
It is a hydrothermal mineral which is precipitated from hot water and water vapour when they move through fractured rocks. It is generally found in the rocks surrounding geological volcanic activity and hot springs.

Thus, the correct answer is C.
Additional information:
Mercury despite being toxic in nature, has various applications in many fields. It is used to fill the tubes in thermometers, barometers and many other apparatus for checking the temperature, pressure, etc. Mercury shows significant change even for a very small change in temperature. Thus, it makes it easier to study the changes in temperature during any process.

Note:
Cinnabar is bright red colored and normally exists as a vein filling mineral in rocks associated with volcanic activity. Due to its bright colour it was used as pigments and in jewellery. It shows symmetry like quartz and is also used to impart colour to stoneware. However due to the presence of mercury, it was found that it has toxic nature and thus its use for decorative purposes decreased. Cinnabar is normally found in granular form and occasionally as crystals. These crystals possess the second highest refractive index.