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Conductivity MP BP and Electronegativity (Group 2)

Consider the ...

Question

Consider the following statements
$I .$ Colour of transition metal complex is dependent on energy difference between two d-levels.
$I I .$ Colour of the complex is dependent on the nature of the ligand and the type of complex formed.
$I I I .$ $Z n {S O}_{4}$ and $T i O_{2}$ are white as a both, d-d spectra are impossible
Select the correct statements.

A

I, I I

and

I I I

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B

I

and

I I

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C

I I

and

I I I

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D

I

and

I I I

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Solution

The correct option is A $I, I I$ and $I I I$
Colour of transition metal complex is dependent on energy difference between $t_{2 g}$ and $e_{g}$ sets of d-orbitals, nature of ligand and type of complex formed. d-d transition is not possible in $d^{1}$ and $d^{0}$ ions (such os ${Z n}^{2 +}, {T i}^{4 +}$ ) cannot show d-d transition, hence colourless.

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