d and f BLOCK ELEMENTS MCQ Quiz: GKFix - Bridge of Knowledge

Question 526

▼

Which lanthanoid commonly exhibits the +2 oxidation state in its compounds?

Samarium (Sm)
Europium (Eu)
Gadolinium (Gd)
Terbium (Tb)

Question 527

▼

Which lanthanoid commonly exhibits the +4 oxidation state in its compounds?

Lanthanum (La)
Neodymium (Nd)
Cerium (Ce)
Europium (Eu)

Question 528

▼

What is a significant difference in the chemistry of early lanthanoids (like La, Ce) compared to later ones (like Yb, Lu) due to the lanthanoid contraction?

Early lanthanoids are more radioactive
Later lanthanoids tend to form more stable complexes
Early lanthanoids are less abundant
Later lanthanoids have higher melting points

Question 529

▼

How does the lanthanoid contraction affect the basicity of Ln(OH)₃ hydroxides?

It causes the basicity to increase from La(OH)₃ to Lu(OH)₃
It has no effect on basicity
It causes the basicity to decrease from La(OH)₃ to Lu(OH)₃
It makes all Ln(OH)₃ equally basic

Question 530

▼

What is the consequence of the lanthanoid contraction on the ionic radii of Ln³⁺ ions across the series?

A gradual increase in ionic radius from La³⁺ to Lu³⁺
No significant change in ionic radius
A gradual decrease in ionic radius from La³⁺ to Lu³⁺
An irregular fluctuation in ionic radius

Report Question Issue