CBSE 2025 · Region 6 · Set 2 · Q21 · 2 marks
Cinnabar is an ore of a metal 'X'. When this ore is heated in air, it is first converted into oxide of 'X' (XO) and then reduced to metal 'X' on further heating. Identify metal 'X' and write chemical equations for the reactions that occur in the above processes.
Marking-scheme solution
' X ' is Mercury.
Reaction involved in its extractions are:
\[\begin{aligned}
2 \mathrm{HgS}+3 \mathrm{O}_{2} & \xrightarrow{\Delta} 2 \mathrm{HgO}+2 \mathrm{SO}_{2} \\
2 \mathrm{HgO} & \xrightarrow{\Delta} 2 \mathrm{Hg}+\mathrm{O}_{2}
\end{aligned}
\]
Metals and Non-metalsOccurrence and Extraction of MetalsApplyvery_short_answermedium
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