2021 - Q21 (6 marks)

​

Four organic liquids are used in an experiment. The four liquids are

• hexane

• hex-1-ene

• propan-1-ol

• propanoic acid.

​

(a) State ONE safety concern associated with organic liquids and suggest ONE way to address this safety concern. (2 marks)

​

(b) The organic liquids are held separately in four flasks but the flasks are not labelled. Tests were conducted to identify these liquids. The outcomes of the tests are summarised below. (2 marks)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

(c) What chemical test, other than those used in part (b), could be used to confirm the identification of ONE of the liquids? Include the expected observation in your answer. (2 marks)