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Copper is the onty elemerit in the 1st ...

Copper is the onty elemerit in the 1st transition series with a positive reduction potential. why?

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Electrode potential value depends on enthalpy of sublimation of the metal, the ionisatión entlalpy and the hydration enthalpy. The sum of enthalpies of sublimation and ionisatiori of copper is not balanced by the hydration enthalpy.. Hence Cur has a +ve value of reduction potential (+0.34V)
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Copper is most noble of the first row transition metals and occurs in small deposits in several countries.Ores of copper include chalcanthite (CuSO_4,5H_2O) atacamite (Cu_2Cl(OH)_3) , cuprite (Cu_2O) , copper glance (Cu_2S) and malachite (Cu_2(OH)_3CO_3) . However, 80% of the world copper production comes from chalcopyrite (CuFeS_2) . The extraction fo copper from chalcopyrite involves partial roasting, removal of iron and self reduction. In self reduction , the reducing agent is

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V PUBLICATION-THE d- AND f- BLOCK ELEMENTS-QUESTION BANK
  1. K2PTCl6' is a well known compound while the corresponding nickel salt ...

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  2. Copper cannot liberate (H)(2). from acids. Why?

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  3. Copper is the onty elemerit in the 1st transition series with a posit...

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  4. All the bonds between manganese and oxygen in '(KMnO4 are covalent. Wh...

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  5. Which is the highest oxidation state shown by any transition mètal?

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  6. Cr(2)O(7)^(2-) is a strong oxidising agent whereas MoO(3) and WO(3) ar...

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  7. Highest fluoride of Mn is MnF(4), whereas highest oxide is Mn(2)O(7) ....

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  8. Draw the structure of Mn(2) O(7) ?

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  9. Name the catnlyst used in (i) the manufacture of sulphuric acid by con...

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  10. Name the catalyst used in i) the oxidation of ammonia to nitric acid b...

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  11. Transition elements act as catalysts. Why?

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  12. Why the transition metal compounds are coloured?

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  13. Give the spin only formula fór calculating the magnetic moment of a tr...

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  14. Name the ores of Titanium?

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  15. . Name the metal, with highest melting point?

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  16. Name the common ores of i) Chromiüm ii) Molybdenum iii) Tungsten

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  17. How is potassium permanganate prepared in the laboratory?

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  18. What is the reaction between KMnO(4) and sodium thiosulphate?

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  19. Potassium permanganate KMnO(4) is not a primary standard Why?

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  20. Actinoids show, a large number of oxidation states Why?

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