Properties of the Transition Elements

2020 1 question

1. 1 The d- and f-Block Elements Medium
   Identify the incorrect statement.
   A The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes. B Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals. C The oxidation states of chromium in $CrO_4^{2-}$ and $Cr_2O_7^{2-}$ are not the same. D $Cr^{2+}$ ($d^4$) is a stronger reducing agent than $Fe^{2+}$ ($d^6$) in water.
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