SPM Science 2017, Paper 2 (Question 8)

Question 8:
Diagram 8.1 shows word equation of the soap making process.

Diagram 8.1

(a) What is the name of the soap making process? [1 mark]

(b) Give one example of substance X. [1 mark]

(c) Diagram 8.2 shows the structure of a soap molecule.
Name the part Y and Z in the boxes provided in Diagram 8.2 using the following words given. [2 marks]

Diagram 8.2

(d) A student found that her clothes stained with dirt.
Arrange the following cleansing actions of soap in the correct sequence in the boxes provided. [2 marks]

(a) Saponification

Palm oil

Y: Hydrophilic
Z: Hydrophobic


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