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SPM Chemistry A xplosive Module (Chemistry A Ticket For “U” ) GREEN ZONE [GZ]
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What is the potential difference of the voltaic cell consisting of copper and iron
electrodes?
Berapakah beza keupayaan sel voltan yang terdiri daripada elektrod kuprum dan besi?
A 0.8 V C 1.8 V
B 1.0 V D 2.4 V

15 Table 3 shows information about three voltaic cells. Metal J, K, L and M are used as
electrodes in the cells.
Jadual 3 menunjukkan maklumat tentang tiga sel voltan. Logam-logam J, K, L dan
M digunakan sebagai elektrod dalam sel itu.
Voltaic cell Negative terminal Positive terminal Voltage (V)
Sel voltan Terminal negatif Terminal positif Voltan (V)
I J K 2.5

II J L 1.7
III M L 0.8
Table 3 / Jadual 3
What is the order of the metals based on the increasing of electropositivity?
Apakah susunan logam berdasarkan kelektropositifan menaik ?
A J, K, L, M C K, L, M, J
B K, M, L, J D J, M, L, K

16 Diagram 6 shows the set-up apparatus for the electrolysis of diluted sodium chloride
solution.
Rajah 6 menunjukkan susunan radas elektrolisis larutan natrium klorida cair.

Carbon electrode
Elektrod karbon
Carbon Diluted aqueous sodium

electrode chloride
Elektrod karbon Natrium klorida akueus

Diagram 6 / Rajah 6

Which of the following statements is not true to describe the change that takes place?
Antara penyataan berikut, yang manakah tidak benar untuk menerangkan perubahan
yang berlaku?

A Oxidation occurs at the anode.
Pengoksidaan berlaku pada anod.
B Bubbles of gas are observed at both electrodes
Gelembung gas diperhatikan pada kedua-dua elektrod
C Chlorine ions are oxidized at the anode
Ion klorida dioksidakan pada anod
D Hydrogen ions are reduced at the cathode
Ion hidrogen diturunkan pada katod

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