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Account for the following: (i) E° value for Mn³⁺/ Mn²⁺ couple is much more positive than that for Cr³⁺/ Cr²⁺. (ii) Sc³⁺ is colourless whereas Ti³⁺ is coloured in an aqueous solution. (iii) Actinoids show wide range of oxidation states.
Write the chemical equations for the preparation of KMnO₄ from MnO₂.
Account for the following: (i) Transition metals form alloys. (ii) Ce⁴⁺ is a strong oxidising agent.
Write one similarity and one difference between chemistry of Lanthanoids and Actinoids.
Complete the following ionic equation: Cr₂O₇²⁻ + 2OH⁻ →
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