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.
Why this shows up in the exam
You will be asked to predict, explain, or compare the colors of various metal ions and complexes.
How NEET tests this
Practise it
These are real questions from past NEET papers that test this exact idea.
Which one of the following ionic species will impart colour to an aqueous solution?
Push further
More challenging12 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.
Which of the following transition metal ions is expected to be colorless in its compounds? (Atomic numbers: Cr = 24, Mn = 25, Co = 27, Cu = 29)
More from The d- and f-Block Elements
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.
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.
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.