(B) The $3d$ metal ions form coloured compounds due to $d-d$ transitions. When white light falls on these complexes,the electrons in the lower energy

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$d-d$ transitions of $3d$ electrons

(B) The $3d$ metal ions form coloured compounds due to $d-d$ transitions. When white light falls on these complexes,the electrons in the lower energy $d$-orbitals absorb energy from the visible region to jump to higher energy $d$-orbitals. The transmitted or reflected light appears coloured,which is complementary to the absorbed colour. Therefore,the correct option is $(B)$.

Class 12 Chemistry Coordination Compounds Crystal Field theory

Easy

The $3d$ metal ions form coloured compounds because the energy corresponding to the following lies in the visible range of the electromagnetic spectrum:

A
Free energy change of complex formation by $3d$ metal ions
B
$d-d$ transitions of $3d$ electrons
C
Heat of hydration of $3d$ metal ions
D
Ionisation energy of $3d$ metal ions

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Class 12

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Chapter

Coordination Compounds

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Crystal Field theory

Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?

MediumNEET 2020

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Consider the metal complexes $[Ni(en)_3]^{2+}$ $(A)$, $[NiCl_4]^{2-}$ $(B)$ and $[Ni(NH_3)_6]^{2+}$ $(C)$. Choose the $\text{CORRECT}$ option by considering the number of unpaired electrons present in $(A)$, $(B)$ and $(C)$ respectively and the order of frequency of absorption.

DifficultJEE MAIN 2026

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Why are different colours observed in octahedral and tetrahedral complexes for the same metal and same ligands?

Medium

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Low spin complex of $d^6$ cation in an octahedral field will have the following energy:
($\Delta_o =$ crystal field splitting energy in an octahedral field,$P =$ Electron pairing energy)

MediumAIPMT 2012

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The number of unpaired $d$-electrons in $[Co(H_2O)_6]^{3+}$ is $\qquad$

MediumJEE MAIN 2024

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The $3d$ metal ions form coloured compounds because the energy corresponding to the following lies in the visible range of the electromagnetic spectrum:

Similar Questions

Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?

Consider the metal complexes $[Ni(en)_3]^{2+}$ $(A)$, $[NiCl_4]^{2-}$ $(B)$ and $[Ni(NH_3)_6]^{2+}$ $(C)$. Choose the $\text{CORRECT}$ option by considering the number of unpaired electrons present in $(A)$, $(B)$ and $(C)$ respectively and the order of frequency of absorption.

Why are different colours observed in octahedral and tetrahedral complexes for the same metal and same ligands?

Low spin complex of $d^6$ cation in an octahedral field will have the following energy:($\Delta_o =$ crystal field splitting energy in an octahedral field,$P =$ Electron pairing energy)

The number of unpaired $d$-electrons in $[Co(H_2O)_6]^{3+}$ is $\qquad$

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Low spin complex of $d^6$ cation in an octahedral field will have the following energy:
($\Delta_o =$ crystal field splitting energy in an octahedral field,$P =$ Electron pairing energy)