Question

Fill in the blanks by choosing the appropriate word(s) from those given in the brackets:

[+2, ethane, tetrahedral, square planar, zero, dry cell, nickel-cadmium cell, propane, Wolff-Kishner, Stephen, completely filled, incompletely filled, paramagnetic, diamagnetic]

The transition metal ions having ______ d-orbitals are colourless and ______ in nature.

Answer 1

The transition metal ions having completely filled d-orbitals are colourless and diamagnetic in nature.

Explanation:

Colourless nature: Transition metal ions are generally colored owing to the existence of partially filled d-orbitals that facilitate d-d electronic transitions through the absorption of visible light. When the d-orbitals are fully occupied, d-d transitions are precluded, resulting in colorless ions.

Diamagnetic nature: Paramagnetism in materials arises from the existence of unpaired electrons in their atomic orbitals. When the d-orbitals are fully occupied, all electrons are coupled. Substances having exclusively paired electrons are repelled by magnetic fields, rendering them diamagnetic.