Complete and balance the following chemical equations :

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CASE_STUDIESPreparation of Potassium PermanganateCBSE PYQ2 sub-questions

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Account for the following: (1) Transition metals form complex compounds. (2) The E°(Mn²⁺/Mn) value for manganese is highly negative whereas E°(Mn³⁺/Mn²⁺) is highly positive. (3) Cu⁺ ion is unstable in aqueous solution.

TextGeneral Characteristics of Transition MetalsVariable Oxidation States of Transition MetalsPreparation of Potassium Permanganate

Write the equations involved in the preparation of KMnO₄ from Pyrolusite ore (MnO₂).

TextGeneral Characteristics of Transition MetalsVariable Oxidation States of Transition MetalsPreparation of Potassium Permanganate

Account for the following : (1) [Ti(H₂O)₆]⁴⁺ is colourless. (2) MnO is basic while Mn₂O₇ is acidic. (3) Actinoids show a wide range of oxidation states.

TextGeneral Characteristics of Transition MetalsColour of Transition Metal CompoundsPreparation of Potassium PermanganateOxidation States of Actinides

Write the preparation of KMnO₄ from MnO₂.

TextGeneral Characteristics of Transition MetalsColour of Transition Metal CompoundsPreparation of Potassium PermanganateOxidation States of Actinides

Complete and balance the following equations : (1) Cr₂O₇²⁻ + 14H⁺ + 6Fe²⁺ → (2) KMnO₄ →(heat)

TextVariable Oxidation States of Transition MetalsProperties of Potassium DichromatePreparation of Potassium Permanganate

When pyrolusite ore is fused with KOH, in presence of air, a dark green coloured product 'A' is obtained which changes to purple coloured compound 'B' in acidic medium. (I) Write the formulae of 'A' and 'B'. (II) Write the ionic equation for the reaction when compound 'B' reacts with Fe²⁺ in acidic medium.

TextIonization Enthalpy of Transition MetalsVariable Oxidation States of Transition MetalsCatalytic Property of Transition MetalsPreparation of Potassium PermanganateProperties of Potassium PermanganateLanthanide Contraction and Its Consequences