Please only answer if you are answer them all. The 6th question is split into 2 puctures and all the questions are multiple choice.

Fractional distillation of crude oil 1 point (petroleum) uses the principle of for separation. * heating towers varying boiling points heat O graph plateaus The molecular formula for 4,5,6- 1 point trimethyl-3-ethyl-4-propyloctane is C8H16 O C16H32 C16H34 C12H26 1 point The name of the organic compound shown below is CH3 CH3 CH3 0 2,2,4-trimethylcycloheptene 2,2,4-trimethyl-1-cycloheptene > O 1,1,3-trimethylcycloheptene 3,3,5-trimethylcycloheptene 1 point Which of the following is NOT an organic substance? * Mg(CN)2 CH4 C2H5OH CH3COOH 1 point Which one of the following organic compounds is an ester? * CH3 - CH2 - O - CHE Option 1 > CH3 -CH=CH-CH2 CH2 O=C 1 O-CH3 ! O Option 2 COOH 1 CH3 - CH2 - C - CH2 CH2OH Option 3 CHI - CH - CH2 - CHO 1 OH > O Option 4 1 point A student has been asked to prepare octyl ethanoate, an artificial orange flavour. The student could prepare this ester by reacting heptan-1-ol and ethanoic acid octan-1-ol and ethanoic acid ethanol and octanoic acid octan-1-ol and methanoic acid 1 point A structural isomer of the molecule shown below is + n-hexane - 2-methylbutane 3-methyhexane 3-methylpentane 1 point The correct name for the substance represented in the diagram is * H CH, HC CH He CH, methylhexane 2-methylhexane 3-methylhexane > 4-methylhexane