Oxidation States and Chemical Reactivity of Lanthanoids

Which of the following oxidation states is common for all lanthanoid?

The general oxidation state of Lanthanoids is _____.

The most common oxidation state of lanthanoids is

The general oxidation state of Lanthanoid series is

Which of the following oxidation state is common for all lanthanoids?

Which of the following lanthanoids show $+2$ oxidation state besides the characteristic oxidation state $+3$ of lanthanoids?

Cerium $\left(\mathrm{Z}=\text{58}\right)$ is a member of the lanthanoids. Identify the incorrect statements about cerium from the following

Which of the following is a good reducing agent?

Which one of the following lanthanide ions does not exhibit paramagnetism?

What is the percentage of lanthanides and iron in Misch metal respectively?

Which lanthanoid compound is used as pigment?

On which factors, the stability of an oxidation state in lanthanides elements depends?

Which of the following statements is incorrect?

All lanthanides exhibit of stable valency of

Which statements among the following are correct?

I. $\mathrm{C}{\mathrm{e}}^{+4}$ is an oxidizing agent & colourless.

II. $\mathrm{L}{\mathrm{u}}^{3+}$ is colourless.

III. Actinoids exhibit a higher number of oxidation states than lanthanoids.

IV. All 3d elements give ${\mathrm{H}}_2$ with 1 M HCl.

Which lanthanide compound is used as a pigment?

What are the most common oxidation states of $\mathrm{Ce}$ (cerium)?

In the context of the lanthanides, which of the following statements is not correct?

The most stable oxidation state of lanthanides is

Which of the following lanthanide is commonly used?