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Chemistry : The d-And-f-Block Elements
Short Answer Type
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71.
Why is copper sulphate pentahydrate coloured?
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72.
Transition metals usually form coloured ions, why?
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73.
Zn, Cd, Hg compounds are usually white. Explain.
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74.
Give one example of any compound in which the oxidation state of Ni is zero.
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75.
Why does V
2
O
5
act as catalyst?
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76.
Transition metals form a large number of interstitial compounds. Explain.
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77.
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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78.
Give two properties in which interstitial compounds differ from its elements.
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79.
What is meant by disproportionation of an oxidation state? Give an example.
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80.
Cu
2+
is more stable than Cu
+
, Explain.
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