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Account for the following/Explain why: Transition metals exhibit variable oxidation states. ( ) and…
Account for the following/Explain why:
(i)
Transition metals exhibit variable oxidation states.
(ii)
$\text{Zr}$ ($Z = 40$) and $\text{Hf}$ ($Z = 72$) have almost identical radii.
(iii)
Transition metals and their compounds act as a catalyst.
Answer
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From ISC 2018 Specimen Chemistry Paper 1, question 13(a).