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Chemistry · JEE

Colour and magnetic properties Concepts for JEE

6+ syllabus-aligned questions available

Quick answer

Master Colour and magnetic properties by understanding definitions, standard results, and typical JEE question patterns — then practise with syllabus-aligned MCQs on Goodmarks.

Build clear conceptual foundations for Colour and magnetic properties before speed practice. This guide covers what JEE expects and how to test yourself with MCQs.

Concept explainer

Colour and magnetic properties is a core JEE Main Chemistry subtopic under Coordination Compounds. Master the definitions, standard results, and typical MCQ patterns tested in JEE Main and Advanced.

Key points

  • Understand the definition and scope of Colour and magnetic properties in the JEE syllabus
  • Memorise key formulas and standard results linked to Colour and magnetic properties
  • Practise 20–40 syllabus-aligned MCQs with step-by-step solutions

JEE tips

  • Revise Colour and magnetic properties with a one-page formula sheet before attempting mixed tests
  • After each practice set, log mistakes specific to Colour and magnetic properties and reattempt after 48 hours

Common trap

Students often rush Colour and magnetic properties questions without checking units, sign conventions, or boundary conditions — always verify assumptions before calculating.

Syllabus context

Part of Coordination Compounds in JEE Main Chemistry.

Free sample questions

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Q1ChemistryUnit 12: Coordination Compounds
The calculated spin-only magnetic moments (BM) of the anionic and cationic species of [Fe(H2O)6]2\left[\boldsymbol{F} e\left(\boldsymbol{H}_{2} \boldsymbol{O}\right)_{6}\right]_{2} and [Fe(CN)6],\left[\boldsymbol{F e}(\boldsymbol{C} \boldsymbol{N})_{\mathbf{6}}\right], respectively, are:
Q2ChemistryUnit 12: Coordination Compounds
Which of the following options are correct regarding the complex [Fe(CN)6]3−and⁡[Fe(CN)6]4−\left[\boldsymbol{F} \boldsymbol{e}(\boldsymbol{C} \boldsymbol{N})_{\boldsymbol{6}}\right]^{\boldsymbol{3}-} \operatorname{and}\left[\boldsymbol{F} \boldsymbol{e}(\boldsymbol{C} \boldsymbol{N})_{\boldsymbol{6}}\right]^{\boldsymbol{4}-} This question has multiple correct options
Q3ChemistryUnit 12: Coordination Compounds
Select the correct statements amount the following: 1. Complexes [Cu(NH3)4]2+,[MnCl4]2+,[Fe(CN)6]\left[\boldsymbol{C u}\left(\boldsymbol{N} \boldsymbol{H}_{3}\right)_{4}\right]^{2+},\left[\boldsymbol{M} \boldsymbol{n} \boldsymbol{C l}_{4}\right]^{2+},\left[\boldsymbol{F} \boldsymbol{e}(\boldsymbol{C} \boldsymbol{N})_{6}\right] are all paramagnetic 2. Complexes [Cu(NH34)]2+,[Ni(CN)4]2−,[Ni(DM\left[\boldsymbol{C u}\left(\boldsymbol{N} \boldsymbol{H}_{3} \boldsymbol{4}\right)\right]^{2+},\left[\boldsymbol{N} \boldsymbol{i}(\boldsymbol{C} \boldsymbol{N})_{4}\right]^{2-},[\boldsymbol{N} \boldsymbol{i}(\boldsymbol{D} \boldsymbol{M} are all square planner 3. The correct stability order of the complexes will be [Fe(H2O)3]3+<\left[\boldsymbol{F e}\left(\boldsymbol{H}_{2} \boldsymbol{O}\right)_{3}\right]^{3+}< [Fe(C2O3)]3−<[Fe(CN)3]3−\left[\boldsymbol{F e}\left(\boldsymbol{C}_{2} \boldsymbol{O}_{3}\right)\right]^{3-}<\left[\boldsymbol{F} \boldsymbol{e}(\boldsymbol{C} \boldsymbol{N})_{3}\right]^{3-} 4. [Cr(en)3]3+\left[\boldsymbol{C r}(\boldsymbol{e n})_{3}\right]^{3+} exist in the three isometric forms
Q4ChemistryUnit 12: Coordination Compounds
The incorrect statement(s) among the following is (are): ¡) Primary valency of a transition metal ion in complex represent its oxidation number. ii) Zn2+Z n^{2+} is colourless. iii) MnCl2M n C l_{2} exhibits green color in aqueous solution. iv) Fe,Co,NiF e, C o, N i complexes are diamagnetic in nature.
Q5ChemistryUnit 12: Coordination Compounds
In nitroprusside ion, the iron and NO exist as Fe+2\mathrm{Fe}^{+2} and NO+\mathrm{NO}^{+}, instead of Fe+3\mathrm{Fe}^{+3} and NO. The given conclusion can be drawn by:
Q6ChemistryUnit 12: Coordination Compounds
In aqueous solution, [Co(H2O)6]2+(X)\left[\boldsymbol{C o}\left(\boldsymbol{H}_{2} \boldsymbol{O}\right)_{6}\right]^{2+}(\boldsymbol{X}) reacts with molecular oxygen in the presence of excess liquor NH3N H_{3} to give a new complex YY. The number of unpaired electrons in XX and YY are, respectively.

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