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Science · 2025 · 2 marks
CBSE 2025 · Region 6 · Set 2 · Q21
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…
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:
\[\begin{aligned}
2 \mathrm{HgS}+3 \mathrm{O}_{2} & \xrightarrow{\Delta} 2 \mathrm{HgO}+2 \mathrm{SO}_{2} \\
2 \mathrm{HgO} & \xrightarrow{\Delta} 2 \mathrm{Hg}+\mathrm{O}_{2}
\end{aligned}
\]
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