Which of the following represents the correct order of the inert pair effect?

Among the following compounds,which on heating do not produce $N_2$?

Regarding the hydrides of group $15$ elements $EH_{3}$ $(E = N, P, As, Sb, Bi)$, select the correct statement from the following:
$A$. The stability of hydrides decreases down the group.
$B$. The basicity of hydrides decreases down the group.
$C$. The reducing character increases down the group.
$D$. The boiling point increases down the group.
Choose the correct answer from the options given below:

Which of the following substances is not an isomorphous true alum and is known as a pseudo alum?

In which of the following arrangements,the sequence is not strictly according to the property written against it?

The possible oxidation states of $Tl$ are