Which one of the following ionic species will impart colour to an aqueous solution?

Question

Which one of the following ionic species will impart colour to an aqueous solution? (A) Ti4 + (B) Cu+ (C) Zn2 + (D) Cr3 +

Tardigrade Admin · Accepted Answer

Here Cr3 + is coloured while rest other ions are coloureless. Ti4 +=[.Ar].4s03d0 (0 unpaired e- ) Cu+=[.Ar].4s03d10 (0 unpaired e- ) Zn2 +=[.Ar].4s03d10 (0 unpaired e- ) Cr3 +=[.Ar].4s03d3 (3 unpaired e- )

Q. Which one of the following ionic species will impart colour to an aqueous solution?

$T i^{4 +}$

$C u^{+}$

$Z n^{2 +}$

$C r^{3 +}$

Here $C r^{3 +}$ is coloured while rest other ions are coloureless.
$T i^{4 +} = [A r] 4 s^{0} 3 d^{0}$ (0 unpaired $e^{-}$ )
$C u^{+} = [A r] 4 s^{0} 3 d^{10}$ (0 unpaired $e^{-}$ )
$Z n^{2 +} = [A r] 4 s^{0} 3 d^{10}$ (0 unpaired $e^{-}$ )
$C r^{3 +} = [A r] 4 s^{0} 3 d^{3}$ (3 unpaired $e^{-}$ )

Q. Which one of the following ionic species will impart colour to an aqueous solution?

Ti4+

Cu+

Zn2+

Cr3+

Here Cr3+ is coloured while rest other ions are coloureless. Ti4+=[Ar]4s03d0 (0 unpaired e− ) Cu+=[Ar]4s03d10 (0 unpaired e− ) Zn2+=[Ar]4s03d10 (0 unpaired e− ) Cr3+=[Ar]4s03d3 (3 unpaired e− )

$T i^{4 +}$

$C u^{+}$

$Z n^{2 +}$

$C r^{3 +}$

Here $C r^{3 +}$ is coloured while rest other ions are coloureless.
$T i^{4 +} = [A r] 4 s^{0} 3 d^{0}$ (0 unpaired $e^{-}$ )
$C u^{+} = [A r] 4 s^{0} 3 d^{10}$ (0 unpaired $e^{-}$ )
$Z n^{2 +} = [A r] 4 s^{0} 3 d^{10}$ (0 unpaired $e^{-}$ )
$C r^{3 +} = [A r] 4 s^{0} 3 d^{3}$ (3 unpaired $e^{-}$ )