Sodium hydroxide solution reacts with phosphorus to give phosphine. To bring about this reaction,we need

When chlorine reacts with a gas $X,$ an explosive inorganic compound $Y$ is formed. Then $X$ and $Y$ will be

The following are some statements related to $VA$ group hydrides:
$I$. Reducing property increases from $NH_3$ to $BiH_3$.
$II$. Tendency to donate lone pair decreases from $NH_3$ to $BiH_3$.
$III$. Thermal stability of hydrides decreases from $NH_3$ to $BiH_3$.
$IV$. Bond angle of hydrides decreases from $NH_3$ to $BiH_3$.
The correct statements are:

Give physical and chemical properties of dinitrogen.

Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at $803 \,\,K$?

Match List $I$ with List $II$:

List $I$ Oxide	List $II$ Type of Bond
$A. N_2O_4$	$I. 1 N-O$ bond
$B. NO_2$	$II. 1 N-O-N$ bond
$C. N_2O_5$	$III. 1 N-N$ bond
$D. N_2O$	$IV. 1 N=N / N\equiv N$ bond

Choose the correct answer from the options given below: