Suggest which reagent and conditions are used in reaction I.
Describe the mechanism of reaction I with a diagram. Show all whole, partial and induced charges, and use curly arrows to show the movement of electron pairs.
Suggest which compounds $B$, $C$ and $E$ are, and draw their structures in the boxes beside them.
Suggest suitable reagents and conditions for reaction II and reaction III.
In reaction II, the nitrogen atoms are eliminated from the organic molecule. Suggest the identity of the nitrogen-containing ion that is formed in this reaction.
Compounds $E$ and $F$ combine to form a polymer and an inorganic product. Draw one repeat unit of this polymer.
Identify which inorganic product is produced.
A $0.100\,\text{mol dm}^{-3}$ solution of compound $D$ has a pH value of $2.60$. Calculate the $[\text{H}^+]$ in this solution.
Hence calculate the value of the acid dissociation constant, $K_a$, of compound $D$.