d and f BLOCK ELEMENTS

What is the typical colour of a Ti3+ aqueous solution?

• Colourless
• Green
• Violet
• Blue

What is the effect of pairing electrons in d-orbitals on the magnetic properties of a complex?

• It always increases paramagnetism.
• It has no effect on magnetism.
• It leads to diamagnetism if all electrons are paired.
• It makes the complex permanently magnetic.

Why do Actinoids generally show more oxidation states than Lanthanoids?

• They are all radioactive.
• They have larger atomic radii.
• Involvement of 5f, 6d, and 7s electrons in bonding.
• They have more electrons overall.

How does the filling of 4f orbitals in Lanthanoids affect their chemical reactivity?

• It makes them highly reactive.
• It causes large variations in reactivity.
• It leads to similar chemical properties across the series due to similar outer electron configurations.
• It makes them behave like transition metals.

What is the significance of the term 'transition elements'?

• They transition from metals to non-metals.
• They have transitional physical properties.
• They represent elements where d-orbitals are being filled progressively.
• They are found between s and p blocks geographically.