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A 0.2 g sample containing copper (II) wa...

A 0.2 g sample containing copper (II) was analysed iodometrically, where copper (II) is reduced to copper (I) by iodide ions. `2Cu^(2+) +4I^(-)rarr2 CuI+I_(2)`
If 20 mL of 0.1 M `Na_(2)S_(2)O_(3)` solution is required for titration of the liberated iodine, then the percentage of copper in the sample will be :

A

`31.75%`

B

`63.5%`

C

`53%`

D

`37%`

Text Solution

Verified by Experts

The correct Answer is:
B
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RESONANCE-EQUIVALENT CONCEPT & TITRATIONS-Exercise -1 (Part-II)
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  4. An ion is reduced to the element when it absords 6xx10^(20) electrons....

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  5. When N(2) is converted into NH(3), the equivalent weight of nitrogen w...

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  6. In the ionic equation 2K^(+)BrO(3)^(-)+12H^(+)+10e^(-)rarrBr(2)+6H(2)O...

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  7. If one mole of H(2)SO(4) reacts with one mole of NaOH, equivalent weig...

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  8. How many millilitres of 0.1 NH(2)SO(4) solution will be required for c...

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  9. One litre of a solution contains 18.9 g of HNO(3) and one litre of an...

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  10. If equal volumes of 0.1 M KMnO(4) and 0.1 M K(2)Cr(2)O(7) solutions ar...

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  11. Which of the following solutions will exactly oxidize 25mL of an acid ...

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  12. An element A in a compound ABD has oxidation number A^(n-). It is oxi...

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