(i) «IUPAC» systematic nomenclature / a single set of naming rules agreed internationally «by IUPAC» ✔

the name is derived from the structure «longest chain, functional group, positions of substituents» so that one name corresponds to exactly one structure ✔

(ii) hydroxyl «group» ✔

phenyl «ring» ✔

(iii) structure of a carboxylic acid with the formula $\ce{C5H10O2}$, e.g. $\ce{CH3CH2CH2CH2COOH}$ drawn as a full or skeletal structure ✔

pentanoic acid ✔

(iv) increases the rate of reaction «and is not used up» ✔

provides an alternative pathway with a lower activation energy / a greater proportion of collisions have energy greater than the activation energy ✔

(v) ultraviolet light / UV «radiation» ✔

(vi) propagation: $\ce{Br^{.} + CH3CH2CH3 -> HBr + CH3CH2CH2^{.}}$

AND $\ce{CH3CH2CH2^{.} + Br2 -> CH3CH2CH2Br + Br^{.}}$

termination «any one of»: $\ce{Br^{.} + Br^{.} -> Br2}$

(i) M1: IUPAC / systematic international nomenclature; M2: names follow rules based on the structure of the molecule. (ii) [1] for each group; do not accept phenol, benzene ring or aromatic ring for phenyl, do not accept alcohol for hydroxyl, do not accept carbonyl (it is part of the ester). (iii) M1: structure of any non-ester isomer of C5H10O2 (a molecular formula alone is not accepted); M2: a name consistent with the structure drawn. Accept 2-methylbutanoic acid, 3-methylbutanoic acid, 2,2-dimethylpropanoic acid or any other correct non-ester isomer. (iv) M1: increases the rate; M2: lower activation energy through an alternative pathway, or more particles with energy at least equal to the activation energy. (v) [1] for UV light; accept sunlight; do not accept light alone or heat. (vi) M1: first propagation step (a bromine radical abstracts a hydrogen from the terminal carbon of propane, giving HBr and a 1-propyl radical); M2: second propagation step (the 1-propyl radical reacts with Br2, giving 1-bromopropane and regenerating a bromine radical); M3: any correct termination step (two radicals combining to give one product with no radical left over). The hydrogen abstracted in M1 must come from the terminal carbon, otherwise 2-bromopropane forms instead of the 1-bromopropane shown.