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0.635g brass dissolved in acid and treated with excess KI, the liberated iodine consumes 60 ml of 0.2N sodiumthiosulphate solution. The w% of copper in brass is?

0.635g brass dissolved in acid and treated with excess KI, the liberated iodine consumes 60 ml of 0.2N sodiumthiosulphate solution. The w% of copper in brass is?

Grade:12th pass

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