d and f BLOCK ELEMENTS MCQ Quiz: GKFix - Bridge of Knowledge

Question 1461

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Why does copper have a positive E°(M2+/M) value?

Its low atomization enthalpy is balanced by its high hydration enthalpy.
Its high atomization enthalpy is sufficiently balanced by its hydration enthalpy.
Its low atomization enthalpy is not balanced by its hydration enthalpy.
Its high atomization enthalpy is not sufficiently balanced by its hydration enthalpy.

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Which of the following elements shows the least number of oxidation states?

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What is the oxidation state of Vanadium in VOCl₂?

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Why is the zero oxidation state possible for metals in complexes like Ni(CO)₄?

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What is the oxidation state of Cobalt in Co₂O₃?