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Science · 2025 · 2 marks
CBSE 2025 · Region 2 · Set 1 · Q21
(a) In common practice silver is recovered from silver nitrate solution by the use of copper metal. Name the type of reaction that takes place in…
(a)
In common practice silver is recovered from silver nitrate solution by the use of copper metal. Name the type of reaction that takes place in this process and give the chemical equation of the reaction involved.
(b)
Name the method used for refining silver.
Marking-scheme solution
(a)
Displacement reaction
\(\displaystyle 2 \mathrm{AgNO}_{3}+\mathrm{Cu} \longrightarrow 2 \mathrm{Ag}+\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}\)
(b)
Electrolytic refining
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CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.