The mixture of $B$ and $C$ are :
$NO \xrightarrow{O_2} A \rightleftharpoons D$
$A \xrightarrow{NaOH \ (aq.)} [B + C]$

On heating lead $(II)$ nitrate gives a brown gas $'A'$. The gas $'A'$ on cooling changes to a colourless solid $'B'$. Solid $'B'$ on heating with $NO$ changes to a blue solid $'C'$. Identify $'A'$,$'B'$ and $'C'$,write the reactions involved,and draw the structures of $'B'$ and $'C'$.

Identify the correct set of $13^{th}$ group elements which do not form amphoteric oxides?

With reference to protonic acids,which of the following statements is correct?

For the properties mentioned,the correct trend for the different species is in

How many of the following reactions will form $PH_3$ gas?
$(1)$ $Ca_3P_2 + H_2O \to$
$(2)$ $H_3PO_3 \xrightarrow{\Delta} $
$(3)$ $P_4 + NaOH \to$
$(4)$ $H_3PO_4 \xrightarrow{\Delta} $
$(5)$ $HNO_3 + P_4O_{10} \to$
$(6)$ $P_4 + HNO_3 \to$