1.1. One of the following molecules in Figure 1 below can polymerise by reaction with itself. Identify the molecule and justify your answer.

Figure 1 

                                                A         HOOCCH₂CH₂COOH 

                                                B         CH₃CH₂CONH₂                                   

                                                C         NH₂CH₂CH₂COCl 

                                                D         NH₂CH₂CH₂CH₂NH₂

1.2. Valylalanine in Figure 2 below, is an example of a dipeptide composed of two amino acids, valine and alanine.

When this compound is placed in acidic conditions, two species are formed.

Draw one of these two species. 

Figure 2

1.3. The structure of glycine, an amino acid, is shown below in Figure 3. 

Figure 3         

i) Give the IUPAC name of glycine.

ii) Draw the displayed structure of the compound formed from the reaction of glycine with an excess of sodium hydroxide, NaOH.

iii) Draw the displayed structure of the compound formed from the reaction of glycine with an excess of ethanol, CH₃CH₂OH, in the presence of concentrated sulfuric acid, H₂SO₄.

iv) Draw the displayed structure of the compound formed from the reaction of glycine with ethanoyl chloride, CH₃COCl

1.4. Unlike the polymers formed by condensation reactions, polyalkenes which are formed by addition polymerisation are not biodegradable. If not disposed of correctly, polyalkenes can end up in a landfill, or as pollution in rivers and oceans.

Evaluate the advantages and disadvantages of incinerating and recycling polyalkenes.