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Identify the incorrect statement.
(NEET 2020)
(a) The transition metals and their compounds are known for their catalytic activity due to
\( P \) their ability to adopt multiple oxidation states and to form complexes.
(b) Interstitial compounds are those that are formed when small atoms like \( \mathrm{H}, \mathrm{C} \) or \( \mathrm{N} \) are
W. trapped inside the crystal lattices of metals.
(c) The oxidation states of chromium in \( \mathrm{CrO}_{4}^{2-} \) and \( \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \) are not the same.
(d) \( \mathrm{Cr}^{2+}\left(d^{4}\right) \) is a stronger reducing agent than \( \mathrm{Fe}^{2+}\left(d^{6}\right) \) in water.
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