Oxidation States and Redox Behavior
Study the variable oxidation states of d- and f-block elements, their stability, and how these relate to redox reactions and electrode potentials.
Why this shows up in the exam
Questions often require you to assign, compare, and rationalize oxidation states and predict redox behavior.
How NEET tests this
Practise it
These are real questions from past NEET papers that test this exact idea.
Four successive members of the first series of the transition metals are listed below. For which one of them the standard potential (E°M²⁺/M) value has a positive sign?
Push further
More challenging13 harder questions built from the past papers above — a step up in difficulty, with distractors designed so you can't get there by elimination. Written and checked by our reviewers, not from a real paper.
Despite having a higher third ionization enthalpy, Cr³⁺ is more stable than Cr²⁺ in aqueous solution. This enhanced stability is primarily attributed to:
More from The d- and f-Block Elements
Redox Reactions of Permanganate and Dichromate
Master the redox reactions, stoichiometry, and n-factor calculations involving KMnO₄ and K₂Cr₂O₇ in different media.
Definition and Electronic Configuration of d- and f-Block Elements
Learn what transition (d-block) and inner transition (f-block) elements are, their position in the periodic table, and how to write their electronic configurations, including for ions.
Magnetic Properties of d- and f-Block Elements
Understand how to calculate and compare magnetic moments, relate them to unpaired electrons, and distinguish between paramagnetic, diamagnetic, and ferromagnetic behavior.
Properties and Oxidation States of Lanthanoids and Actinoids
Explore the electronic configurations, oxidation states, magnetic and spectral properties, and chemical behavior of lanthanoids and actinoids.
Colour of Transition and Inner Transition Metal Ions
Learn why d- and f-block ions and complexes are colored, focusing on d-d and f-f transitions and the role of electronic configuration.
Lanthanoid Contraction and Its Consequences
Understand the concept of lanthanoid contraction, its causes, and its effects on atomic/ionic radii and properties of subsequent elements.