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Q)

Ozone reacts with

$\begin {array} {1 1} (A)\;\text{copper only} \\ (B)\;\text{ both copper and silver only} \\ (C)\;\text{all the three coinage metals} \\ (D)\;\text{none of the three coinage metals} \end {array}$

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A)
Answer : both copper and silver only
$Cu+O_3 \rightarrow CuO+O_2$
$2Ag+O_3 \rightarrow Ag_2O+O_2$
$Ag_2O+O_3 \rightarrow 2Ag+2O_2$
$ \qquad \qquad \qquad ( \text{black} )$
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