General Properties of Lanthanoids

How many reactions represent correct products :

(i) Ln (Lanthanoid) $\underset{\mathrm{Halogen}}{\overset{ \mathrm{with}}{\to }}{LnX}_2$

(ii) Ln (Lanthanoid) $\underset{{\mathrm{O}}_2}{\stackrel{\mathrm{\Delta }}{⟶}}{\mathrm{Ln}}_2{\mathrm{O}}_3$

(iii) Ln (Lanthanoid) $\underset{{\mathrm{N}}_2}{\stackrel{\mathrm{\Delta }}{⟶}}{\mathrm{Ln}}_3 \mathrm{N}$

(iv) Ln (Lanthanoid)$\underset{∆}{\overset{\mathrm{S}}{\to }}{\mathrm{Ln}}_2{\mathrm{S}}_3$

(v) Ln (Lanthanoid) $\underset{{\mathrm{H}}_2\mathrm{O}}{\overset{\mathrm{Wih}}{\to }}\mathrm{Ln}{\left(\mathrm{OH}\right)}_3+{\mathrm{H}}_2$
(vi) Ln (Lanthanoid) $\underset{ \mathrm{acids}}{\overset{\mathrm{with}}{\to }}{\mathrm{H}}_2$

Identify the formula of compound $\left(\mathrm{B}\right)$ formed in following reaction.

(i) Lanthanoide $\left(\mathrm{Ln}\right)$ burnt in oxygen forming compound $\left(\mathrm{A}\right)$

(ii) Compound $\left(\mathrm{A}\right)$ reacts with ${\mathrm{CO}}_2$ in excess to form compound $\left(\mathrm{B}\right)$

Which of the following statement is not correct :

Which of the following lanthanoid ions is diamagnetic ? $($Atomic number of atoms, $\mathrm{Ce}=58,\mathrm{Sm}=62,\mathrm{Yb}=70,\mathrm{Eu}=63)$

Which of the following pairs of ions is expected to show colour in aqueous solutions?

Which of the following is used as a good oxidising agent in analytical chemistry ?

Which of the following is most basic ?

Spin magnetic moment of lanthanide ions is determined from which one of the following relation :

Knowing that the chemistry of lanthanoids $\left(\mathrm{Ln}\right)$ is dominated by its $+3$ oxidation state, which of the following statement is incorrect?

The number of gaseous product(s) are formed on the basis of following reactions :

              (Chemical reactions of the lanthanoids)

Which of the following is most basic ?

Anti-penultimate electronic configuration of a trivalent lanthanide ion is 4f³ and has similar colour in aqueous solution as another trivalent lanthanide ion having anti-penultimate electronic configuration of

Incorrect statement is:

Which among the following is strongest base ?

Find the incorrect statement.

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 ions show colour:

Which statement is incorrect with reference to inner transition elements?

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

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