d- and f-Block Elements

An Inorganic Chemistry unit for JEE Main 2027 (typically 4-6% of the paper). It covers the transition (d-block) elements — general trends, variable oxidation states, colour, magnetic and catalytic behaviour, interstitial compounds and alloys, and the preparation and properties of KMnO4 and K2Cr2O7 — and the inner-transition (f-block) elements — lanthanoids (electronic configuration, oxidation states, lanthanoid contraction) and actinoids.