The d-And-f-Block Elements

Short Answer Type

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Give one example of any compound in which the oxidation state of Ni is zero.

[Ni(CO)4], tetracarbonyl nickel(O).
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    Why is copper sulphate pentahydrate coloured?

     
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    Zn, Cd, Hg compounds are usually white. Explain.
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    Transition metals form a large number of interstitial compounds. Explain.
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    Cu2+ is more stable than Cu+, Explain.
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    What is meant by disproportionation of an oxidation state? Give an example.
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    What is an alloy? Name the two types of alloy formed by transition elements. Give one example of a solid solution in relation to a smooth alloy.
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    Why does V2O5 act as catalyst?
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    Give two properties in which interstitial compounds differ from its elements.
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    Transition metals usually form coloured ions, why?
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