Hazard, risk and organic nomenclatureEdexcel International A Level Chemistry: Mind map

Exam questions on Hazard, risk and organic nomenclature

1. A technician is preparing a class practical in which students burn small samples of ethanol and hexane in spirit burners to compare the temperature rise of 100 cm³ of water. Hexane is highly flammable and its vapour can form an explosive mixture with air; ethanol is also flammable.
   Explain why a risk assessment should be carried out before the practical begins.2 marks
2. A stockroom list gives the structural formulae of four organic liquids: propan-1-ol, CH₃CH₂CH₂OH; butan-1-ol, CH₃CH₂CH₂CH₂OH; propanal, CH₃CH₂CHO; and propanoic acid, CH₃CH₂COOH.
   Explain why propan-1-ol and butan-1-ol are members of the same homologous series.2 marks
3. A chemist is labelling unnamed bottles of organic compounds in a stockroom and must use IUPAC names and formulae, so that the compounds can be identified by anyone using the stockroom.
   Give the IUPAC name of each of these compounds: (i) CH₃CH(CH₃)CH₂CH₃, (ii) CH₃CH₂CHBrCH₃, (iii) CH₃CH=CHCH₂CH₃.3 marks