Pentavalency in phosphorus is more stable when compared to that of nitrogen,even though they belong to the same group. This is due to:

$p$-Block elements form acidic,basic,and amphoteric oxides. Explain each property by giving two examples and also write the reactions of these oxides with water.

Which one of the following group-$15$ hydrides is the strongest reducing agent?

Consider the reaction:
$P_4 + 3 NaOH + 3 H_2 O \rightarrow Q + 3 NaH_2 PO_2$
Identify the reaction in which $Q$ is not the product. (Equations are not balanced)

Write four characteristic properties of $p$-block elements.

An inorganic salt $(A)$ is decomposed at about $523 \ K$ to give products $(B)$ and $(C).$ Compound $(C)$ is a liquid at room temperature and is neutral to litmus paper,while oxide $(B)$ on burning with white phosphorus,gives a dehydrating agent $(D).$ Compounds $(A)$,$(B)$,$(C)$ and $(D)$ will be identified as: