06 Transfer of Electrons & – OnlineTuition.com.my

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Question 1 of 6

1. Question
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Diagram to the right shows a simple cell. Which of the substances below undergoes reduction reaction in the cell?
- Zinc
- Copper
- nitrate ions
- hydroxide ions
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Question 2 of 6

2. Question
1 point(s)
The figure shows the apparatus set up of a chemical cell.

Which of the following is true?
- I. Copper(II) electrode is the positive terminal.
- II. Zinc electrode is corroded.
- III. Reduction occurs at copper electrode.
- IV. Electron flows from zinc to copper through the external circuit.
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Question 3 of 6

3. Question
1 point(s)
The figure above shows a set-up of apparatus of a redox reaction. Which of the following statement are not correct?
- Electrons flow from electrode P to Q through the wire.
- Iron(II) ions is reduce in the reaction.
- Acidified potassium permanganate(VII) solution is bleached.
- The green colour of iron(II) sulphate solution turn brown.
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Question 4 of 6

4. Question
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The diagram shows an experiment of transferring electron at a distance. Which of the following statements are true about this experiment?
- I. Iodide ions act as a reducing agent.
- II. A brownish solution formed around electrode P.
- III. Electrons transfer from electrode Q to electrode P.
- IV. Electrode P become the negative terminal.
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Question 5 of 6

5. Question
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The diagram shows the apparatus set-up of an experiment to study a redox reaction. At the end of the reaction, the orange colour of potassium dichromate (VI) solution turn green and potassium iodide turn orange. Which of the following statement explains the changes of colour in the experiment?
- I. Potassium ions around electrode P is oxidized.
- II. Dichromate(VI) ion is reduced to chromium ion (III)
- III. Dichromate(VI) ions have moved into potassium iodide solution.
- IV. Iodide ions are oxidized to iodine molecules.
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Question 6 of 6

6. Question
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The diagram to the right shows the set-up of the apparatus used to study the transfer of electrons at a distance.

A student found that the reading of the galvanometer is zero. This is because
- both electrolytes used are oxidising agent
- aqueous potassium nitrate is used as salt bridge
- no supply of electric current to the cell
- platinum electrode is used instead of carbon electrode
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