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Chemistry CBSE Live product
Pre-Crash Course
Chemical reactions and equations
7.
TBQ - Redox reaction
Question:
5
m.
Answer the following question:
Analyse the given equation:
\(CuO + H_2 → Cu +H_2O\)
i.
Define oxidising agent.
An oxidising agent is a substance that
causes another substance to undergo reduction by gaining electrons from it
causes another substance to undergo oxidation by losing electrons from it
causes another substance to undergo reduction by losing electrons from it
causes another substance to undergo oxidation by gaining electrons from it
.
ii.
Identify the correct change in oxidation states of copper and hydrogen.
\(Cu\) is reduced from \(+2\) to \(0\) and \(H\) is oxidised from \(0\) to \(+1\)
\(Cu\) is reduced from \(+1\) to \(0\) and \(H\) is oxidised from \(0\) to \(+2\)
No change in oxidation state
\(Cu\) is oxidised from \(+2\) to \(0\) and \(H\) is reduced from \(0\) to \(+1\)
iii.
Identify the reducing agent.
\(CuO\)
\(H_2\)
\(Cu\)
\(H_2O\)
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