Page 49 - Spotlight A+ Form 4 & 5 Chemistry KSSM

Paper 2
Section A
[60 marks]

Answer all questions.
1. Figure 1 shows the manufactured substances in industries.

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Reinforced concrete Bronze Laboratory glassware
Figure 1
(a) Reinforced concrete is produced by reinforce steel to the concrete. Between the reinforce steel and
concrete, which one acts as the matrix? [1 mark]
(b) Bronze is a type of alloy. Name two elements in the bronze. [2 marks]
(c) State one reason for using borosilicate glass to make laboratory glassware. [1 mark]

2. Soap dissolves in water to form soap anion. Soap anion consists of two parts as shown in Figure 2.
CH CH CH CH CH CH CH CH O
3 2 2 2 2 2 2 2
CH CH CH CH CH CH CH C
2 2 2 2 2 2 2
O – SPM MODEL PAPER
Part P Part Q
Figure 2
(a) Name part P and part Q. [2 marks]
(b) The following are three types of solutions, A, B and C used to dissolve a soap.
A: Magnesium sulphate, MgSO solution
4
B: Sodium nitrate, NaNO solution
3
C: Zinc chloride, ZnCl solution
2
(i) Choose a solution in which the cleansing action of the soap is not effective. [1 mark]
(ii) Explain your answer in (b)(i). [2 marks]
3. Figure 3.1 shows the atomic structure of a carbon atom.

W

Figure 3.1
(a) Based on Figure 3.1, complete Table 3.
Subatomic particle Relative mass Relative charge
W

Table 3
[2 marks]
531