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Science · 2024 · 3 marks
CBSE 2024 · Region 5 · Set 1 · Q28
Name the ore of mercury and state the form in which it is found in nature. Write the chemical equations along with the condition required for the…
Name the ore of mercury and state the form in which it is found in nature. Write the chemical equations along with the condition required for the reactions involved in the extraction of mercury from its ore.
Marking-scheme solution
Cinnabar
Sulphide ore
\(\displaystyle 2 \mathrm{HgS}+3 \mathrm{O}_{2} \xrightarrow{\text { Heat }} 2 \mathrm{HgO}+2 \mathrm{SO}_{2}\)
\(\displaystyle 2 \mathrm{HgO} \xrightarrow{\text { Heat }} 2 \mathrm{Hg}+\mathrm{O}_{2}\)
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CBSE Class 10 Science past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.