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Diagram 22 shows an incomplete apparatus set up.
Rajah 22 menunjukkan susunan radas yang tidak lengkap.
Which of the following diagrams shows the correct completion at X after the solution
has been electrolysed for some time?
Antara rajah berikut yang manakah merupakan pelengkap yang betul di X selepas elektrolisis
dijalankan beberapa ketika?