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Question is

The elements of 3d transition series are given as:
Sc Ti V Cr Mn Fe Co Ni Cu Zn

Answer the following:
i) Write the element which shows a maximum number of oxidation states.Give reason.
ii) Which element has the highest m.p?
iii) Which elements shows only +3 oxidation state ?
iv) which element is a strong oxidising agent in +3 oxidation state and why?

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