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Silver metal in ore is dissolved by pota...

Silver metal in ore is dissolved by potassium cyanide solution in the presence of air by the reaction
`4 Ag + 8KCN +O_(2)+2H_(2)O rarr 4K[Ag(CN)_(2)]+4KOH`

A

The amount of KCN required to dissolved 100 g of pure Ag is 120 g

B

The amount of oxygen used in this process is 0.742 g (for 100 gm pure Ag).

C

The amount of oxygen used in this process is 7.40 g (for 100 gm pure Ag).

D

The volume of oxygen used to STP is 5.25 litres.

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The correct Answer is:
A, C, D
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