The least stable oxide at room temperature is

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(D) The stability of metal oxides is related to the standard Gibbs free energy of formation. Among the given options,$Ag_2O$ is the least stable oxide

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$Ag_2O$

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(D) The stability of metal oxides is related to the standard Gibbs free energy of formation. Among the given options,$Ag_2O$ is the least stable oxide at room temperature. It decomposes easily upon heating: $Ag_2O \xrightarrow{\Delta} 2Ag + \frac{1}{2}O_2$ Other oxides like $ZnO$,$CuO$,and $Sb_2O_3$ are significantly more stable and do not decompose at room temperature.

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