Ammonia is liberated in the reaction of

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:

Write a note on $p$-block elements of the periodic table.

Which element is not present in Nessler's reagent?

Which is an incorrect match?

The number of hydrogen atoms directly attached to the phosphorus atom in phosphorous acid is