Give reasons: Among transition metals, the highest oxidation state is exhibited in oxoanions of a metal.
Oxygen is strong oxidising agent due to its high electronegtivity and smaller size. because of these properties Oxygen are able to oxidise the metal to its highest oxidation state. for example CrO42- shows +6 oxidation state.
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Why is cerium a good analytical reagent?
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Actinide cations are coloured? Why?
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Give reasons: Zn2+ salts are white while Cu2+ salts are blue.
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Give reasons: Ce4+ is used as an oxidising agent in volumetric analysis.
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Eu2+, Yb2+ are good reductants whereas Tb+4 is an oxidant. Why?
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Complete the following reaction equations: (i) Cr2O72 + Sn2+ + H+ → (ii) MnO4– + Fe2+ + H+ →
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Why La, Gd and Lu has low value of 3rd ionisation enthalpies?
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Explain the following facts: Transition metals form coloured complexes.
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Given below are the electrode potential values, E° for some of the first row of transition elements: Elements V(23) Cr(24) Mn(25)Fe(26)Co(27)Ni(28) Cu(29) E°M2+/M(V) –1.18 – 0.91 – 0.44 – 0.28 –0.28 –0.25 +0.34 Explain the irregularities in these values on the basis of electronic structures of atoms.