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Statement-1 : Native $Ag$ and ${Ag}_{2} S$ are dissolved in ${CN}^{-}$ solution in presence of Air ( $O_{2}$ ).

Statement-2 : Air ( $O_{2}$ ) acts as oxidant for $Ag$ and ${Ag}_{2} S$ both.

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Statement-1 is false, statement-2 is true.

Statement-1 is true, statement-2 is false.

Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.

Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.

answer is C.

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Detailed Solution

${Ag}_{2} S + 4 NaCN \overset{air / O_{2}}{⇆} 2 na [Ag {(CN)}_{2}] + {Na}_{2} S$

Role of air/ $O_{2}$ is to oxidize ${Na}_{2} S$ to proceed reaction forward.

$2 Ag + 4 naCN + H_{2} O + \frac{1}{2} O_{2} ˥ 2 Na [Ag {(CN)}_{2}] + 2 NaOH$

Native ore Role of air/ $O_{2}$ is to oxidize $Ag$ noble metal into ${Ag}^{+}$

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