Download App

Coordination Compounds — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryCoordination Compounds1 Mark
MCQ
The colour of a complex compound is due to:
  • A
    Promotion of $3d-$electrons of the central atom/ion to $4s-$orbital.
  • B
    Promotion of $3d-$electrons of the central atom/ion to $4p-$orbitals.
  • ✓
    Promotion of $3d-$electrons of the central atom/ion to $d-$orbitals.
  • D
    Promotion of $4s-$electrons of the central atom/ion to $4p-$orbitals.
✓

Answer

Correct option: C.
Promotion of $3d-$electrons of the central atom/ion to $d-$orbitals.
The colour of a complex compound is due to promotion of $3d-$electrons of the central atom/ion to $d-$orbitals..
The colour of the complex compound is due to $d−d$ electronic transition.The $d-$orbitals of a free transition metal atom or ion are degenerate $($all have the same energy$.)$
When transition metals form coordination complexes, the $d-$orbitals of the metal interact with the electron cloud of the ligands in such a manner that the $d-$orbitals become non$-$degenerate $($not all having the same energy$).$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Coordination Compounds→Coordination Compounds — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Standard reduction potentials of the half reactions are given below :

$F_{2(g)} + 2e^- \rightarrow 2F^-_{(aq)}\, ;$  $E^o = + 2.85\, V$

$Cl_{2(g)} + 2e^- \rightarrow 2Cl^-_{(aq)}\, ;$   $E^o = + 1.36\, V$

$Br_{2(l)} + 2e^- \rightarrow 2Br^-_{(aq)}\, ;$  $E^o = + 1.06\, V$

$I_{2(s)} + 2e^- \rightarrow 2I^-_{(aq)}\, ;$  $E^o = + 0.53\, V$

The strongest oxidising and reducing agents respectively are

→
Which of the following statement is correct?
→
Which of the acids cannot be prepared by Grignard reagent
→
The ionic conductance of following cation in a given concentration are in the order
→
$9.3 \mathrm{~g}$ of pure aniline is treated with bromine water at room temperature to give a white precipitate of the product ' $\mathrm{P}$ '. The mass of product ' $\mathrm{P}$ ' obtained is $26.4 \mathrm{~g}$. The percentage yield is ......... $%$.
→
Consider the above reaction, the product $A$ and product $B$ respectively are ...
→
A colloidal sol can be prepared by:
→
Which of the following react with $NaHS{O_3}$
→
The boiling point of aldehydes and ketones are _________ than the boiling point of hydrocarbons and ethers of equal molecular mass:
→
The density (in $mL^{-1}$ ) of a $3.60\,M$ sulphuric acid solution that is $29\%\,\,H_2SO_4$

(Molar mass $= 98\,g\,mol^{-1}$ ) by mass will be

→