Red phosphorus is less reactive than yellow phosphorus because

Which hydride among the following is the strongest reducing agent?

What is the nature of hydrides and oxides of Group $15$ elements?

When bauxite powder is mixed with coke and heated with nitrogen at $2075 \ K$,carbon monoxide and $x$ are formed. Which gas is produced when $x$ reacts with water?

Assertion $(A)$: In group $15$ elements, nitrogen does not form pentahalides.
Reason $(R)$: Nitrogen can exhibit $+5$ oxidation state.
The correct option among the following is:

Of the following hydrides,which has the lowest boiling point?