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0.2828g of iron wire was dissolved in ex...

`0.2828g` of iron wire was dissolved in excess dilute `H_(2)SO_(4)` and the solution was made up to `100 mL`. `20mL` of this solution required `30mL` of `N//30 K_(2)Cr_(2)O_(7)` doluyion for exact oxidation. Calculate `%` purity of `Fe` in wire.

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The correct Answer is:
`99%`
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0.2828 g of iron wire was dissolved in excess dilute H_(2)SO_(4) and the solution was made upto 100mL. 20mL of this solution required 30mL of N/(30)K_(2)Cr_(2)O_(7) solution for exact oxidation. Calculate percent purity of Fe in wire.

25 g of a sample of FeSO_(4) was dissolved in water containing dil. H_(2)SO_(4) and the volume made upto 1 litre. 25 mL of this solution required 20mL of N/ 10 KMnO_(4) for complete oxidation. Calculate % of FeSO_(4).7H_(2)O in given sample.

P BAHADUR-RADIO ACTIVITY-Exercies 9
  1. 0.84g iron are containing X per cent of iron was taken in a solution ...

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  2. 0.5g sample of iron containg mineral mainly in the form of CuFeS(2) wa...

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  3. 0.2828g of iron wire was dissolved in excess dilute H(2)SO(4) and the ...

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  4. A substance of crude copper is boiled in H(2)SO(4) till all the copper...

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  5. What mass of K(2)Cr(2) O(7) is required to produce 5.0 litre CO(2) at ...

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  6. Calculate the mass of oxalic (H(2)C(2)O(4).2H(2)O) which can be oxidis...

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  7. The calcium contained in a solution of 1.048g of a substance being ana...

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  8. 100 mL solution of FeC(2)O(4) and FeSO(4) is compleltely oxidized by ...

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  9. 25mL of a solution containing Fe^(2+) and Fe^(3+) sulphate acidifed ...

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  10. A sample of ferrous sulphate and ferrous oxalate was dissolved in dil....

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  11. A soltuion contains mixture of H(2)SO(4) and H(2)C(2)O(4), 25mL of N//...

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  12. A compound is known to be hydrated doubel salt of potassium oxalate an...

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  13. 30mL of a soltuion containg 9.15g//"litre" of an oxalte K(X) H(Y) (C(2...

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  14. On igniion, Rochelle salt NaKC(4) H(4) O(6). 4H(2)O (mol. Wt 282) is c...

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  15. 25mL of a solution of ferric alum Fe(2)(SO(4))(3) (NH(4))(2) (SO(4))//...

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  16. A 2.5g sample containing As(2) O(5) Na(2) HAsO(3) and inert substance...

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  17. Calculate the weight of MnO(2) and the volume fo HCI of specific grav...

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  18. Chile saltpetre, a source of NaNO(3) also contains NalO(3). The NalO(3...

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  19. (a) CusO(4) reacts with KI in acidic medium to liberate I(2): 2CuSO(...

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  20. Calculate the amont of SeO(4)^(2-) in solution on the basic of the fo...

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