Q9 / 150 · MHT CET 2025 (23 Apr Shift 1) · Chemistry

Identify correct statement for reaction stated below. $\mathrm{Ag}_2 \mathrm{O}+\mathrm{H}_2 \mathrm{O}+2 \overline{\mathrm{e}} \rightarrow 2 \mathrm{Ag}+2 \mathrm{OH}^{-}$

  • A
    Water is oxidised.
  • B
    Hydrogen is oxidised.
  • Correct answer
    C
    Silver is reduced.
  • D
    Hydrogen is reduced.

Solution

The reaction is $\mathrm{Ag}_2 \mathrm{O} + \mathrm{H}_2 \mathrm{O} + 2 \overline{\mathrm{e}} \rightarrow 2 \mathrm{Ag} + 2 \mathrm{OH}^{-}$.

The oxidation state of silver in $\mathrm{Ag}_2\mathrm{O}$ is +1, determined from $2(x) + (-2) = 0 \Rightarrow x = +1$.
In silver metal, the oxidation state is 0, indicating silver is reduced.

Oxygen has an oxidation state of -2 in all species, and hydrogen is +1, with no change.
The correct statement is that silver is reduced.

Hence, the correct answer is option: 'C'.

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