Which of the following predictions is correct | vedclass

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(A) Step $1$: Transition metal ions exhibit colour due to $d-d$ electronic transitions.Step $2$: For a $d-d$ transition to occur, the $d$-orbital must

Vedclass · Accepted Answer

It contains $0$ unpaired electrons.

Vedclass · Answer

(A) Step $1$: Transition metal ions exhibit colour due to $d-d$ electronic transitions.Step $2$: For a $d-d$ transition to occur, the $d$-orbital must be partially filled, meaning there must be at least one unpaired electron.Step $3$: If a transition metal ion is colourless, it implies that no $d-d$ transition is possible.Step $4$: This occurs when the $d$-orbital is either completely empty $(d^0)$ or completely filled $(d^{10})$, both of which correspond to $0$ unpaired electrons.

List-$I$	List-$II$
$a. [Fe(CN)_{6}]^{3-}$	$i. 5.92 \ BM$
$b. [Fe(H_{2}O)_{6}]^{3+}$	$ii. 0 \ BM$
$c. [Fe(CN)_{6}]^{4-}$	$iii. 4.90 \ BM$
$d. [Fe(H_{2}O)_{6}]^{2+}$	$iv. 1.73 \ BM$

Which of the following predictions is correct when a transition metal ion is colourless?

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Match List-$I$ with List-$II$.

List-$I$ List-$II$

$a. [Fe(CN)_{6}]^{3-}$ $i. 5.92 \ BM$

$b. [Fe(H_{2}O)_{6}]^{3+}$ $ii. 0 \ BM$

$c. [Fe(CN)_{6}]^{4-}$ $iii. 4.90 \ BM$

$d. [Fe(H_{2}O)_{6}]^{2+}$ $iv. 1.73 \ BM$

Choose the correct answer from the options given below.

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