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K2PTCl6' is a well known compound while ...

K2PTCl6' is a well known compound while the corresponding nickel salt is unknown?

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The oxidation state of .(Pt). in .(K)_(2) (P) (CCl)_(6). is .+4 .. Thermodynamic stability of compounds of transition metals can be evaluated-in terms of the magnitude of ionisation enthalpies of the metals, Smaller the ionisation energy of the metal Stabler is its compound. The sum of Ist four ionisation enthatpies of Pt is less than that, of Ni. Hence .(K)_(2) (PtCl)_(6). is known whereas corresponding Ni compoünd is unknown.
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V PUBLICATION-THE d- AND f- BLOCK ELEMENTS-QUESTION BANK
  1. Manganese and technetium have very low melting points. Why?

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  2. Name the transition element with highest density?

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  3. K2PTCl6' is a well known compound while the corresponding nickel salt ...

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

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

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

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

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

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

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

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

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

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  13. Transition elements act as catalysts. Why?

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  14. Why the transition metal compounds are coloured?

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

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  16. Name the ores of Titanium?

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

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

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  19. How is potassium permanganate prepared in the laboratory?

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

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