Chemistry · JEE

Important Questions: Colour and magnetic properties for JEE

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The most important Colour and magnetic properties questions for JEE cover conceptual traps, standard results, and numerical patterns from Colour and magnetic properties. Goodmarks provides 2+ high-yield MCQs with full solutions.

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Q1ChemistryUnit 12: Coordination Compounds

Select the correct statements amount the following: 1. Complexes

\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

\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

\left[\boldsymbol{F e}\left(\boldsymbol{H}_{2} \boldsymbol{O}\right)_{3}\right]^{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-}

\left[\boldsymbol{C r}(\boldsymbol{e n})_{3}\right]^{3+}

exist in the three isometric forms

Q2ChemistryUnit 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)

Z n^{2+}

is colourless. iii)

M n C l_{2}

exhibits green color in aqueous solution. iv)

F e, C o, N i

complexes are diamagnetic in nature.

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What makes a Colour and magnetic properties question "important" for JEE?

Important questions test core concepts that appear frequently across JEE Main and Advanced papers — definitions, standard formulas, and classic problem types.

Which subtopics in Coordination Compounds are high-weightage?

Key areas include Colour and magnetic properties. Prioritise these before moving to edge cases.

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Revise 30–50 important MCQs per unit in the last month before JEE. Focus on questions you got wrong at least once.

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