Name a member of the lanthanoid series which is well known to exhibit $+4$ oxidation state.

Which elements exhibit nearly identical properties?

Match the element/compound given in List-$I$ with the uses given in List-$II$:

List-$I$ (Element/Compound)	List-$II$ (Use)
$A$. Lanthanoid oxide	$1$. Production of iron alloys
$B$. Lanthanoid	$2$. Television screens
$C$. Mischmetal	$3$. Petroleum cracking
$D$. Magnesium based alloy	$4$. Lanthanoid metal $+$ iron
$E$. Mixed lanthanoid oxides	$5$. Bullet tips
	$6$. $X$-ray screens

Which of the following elements belongs to the actinide series?

The highest oxidation state in plutonium (At. No. = $94$) is

$Ln$ (Lanthanide) $\xrightarrow{\text{With Halogen}} X$
$Ln$ (Lanthanide) $\xrightarrow{\text{Burn With } O_2} Y$
$Ln$ (Lanthanide) $\xrightarrow{\text{Heated with } N_2} Z$
$X, Y$ and $Z$ are respectively:-