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Question
Which of the following is an ore of mercury metal?
Options
rock salt
cinnabar
calamine
haematite
MCQ
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Solution
Cinnabar
Explanation:
Cinnabar is the primary natural sulphide mineral used to extract mercury, consisting essentially of mercury (II) sulphide (HgS). The other options are incorrect because rock salt is a source of sodium, calamine is a zinc carbonate ore, and haematite is an iron oxide ore.
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