Chemistry·MCQ Practice

Oxidation States and Lanthanoid Contraction — MCQ Practice

NEET UG

Version 1Updated 22 Mar 2026

Explore This Topic

Test your knowledge. Click “Solve” to reveal options, select your answer, then check the result. 6 questions available.

Q1easy

Which of the following statements about the oxidation states of lanthanoids is INCORRECT?

Q2easy

The gradual decrease in atomic and ionic radii across the lanthanoid series is known as:

Q3medium

Which of the following is a direct consequence of lanthanoid contraction?

Q4medium

What is the electronic configuration of Gd $^{3+}$ (Gadolinium ion)? (Atomic number of Gd = 64)

Q5medium

Which of the following lanthanoid ions is expected to be a strong oxidizing agent?

Q6medium

The basicity of lanthanoid hydroxides, Ln(OH) $_3$ , generally decreases from La(OH) $_3$ to Lu(OH) $_3$ . This trend is best explained by: