What is the order of following reaction

$$2 \mathrm{H}_2 \mathrm{O}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{H}_2 \mathrm{O}_{(\mathrm{l})}+\mathrm{O}_{2(\mathrm{~g})}$$

Crotonyl alcohol is an example of

Identify basic amino acid from following.

Which from following is a copolymer?