Question

$[Sc(H_{2}O{)}_6{]}^{3+}$ ion is

• A. colourless and diamagnetic
• B. coloured and octahedral
• C. colourless and paramagnetic
• D. coloured and paramagnetic

Answer 1

Answer: (A)

$[Sc(H_{2}O{)}_6{]}^{3+}$,oxidation state of Sc is + 3.
$\because S{c}^{3+}$ has no unpaired electrons.
$\therefore [Sc(H_{2}O{)}_6{]}^{3+}$ is diamagnetic and colourless.