SK025 CHAPTER 3 ELECTROCHEMISTRY

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others
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12th Grade
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Medium
SITI KM-Pensyarah
Used 5+ times
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14 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
2. The standard reduction electrode potential for several half-reactions at 298 K are shown below. Which of the following species is the strongest oxidising agent?
X⁻
Y³⁺
Z
X₂
Answer explanation
strongest oxidising agent -> undergo reduction (gain electron, +SRP value) -> species who gain electron (look at reactant side)
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
4. What are the features of a standard hydrogen electrode?
I. Hydrogen gas at 1 atm and 298 K
II. A platinum electrode
III. A carbon electrode
IV. 1M aqueous solution of a strong acid
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
5. The following diagram shows a galvanic cell. Which of the following statements is correct?
Aluminium electrode is the negative terminal.
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
6. 2Ag⁺ (aq) + Mg (s) ⟶ 2Ag (s) + Mg²⁺ (aq)
Calculate E° cell.
[Given E° Ag⁺/Ag = +0.80V and E° Mg²⁺/Mg= - 2.36V ]
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
7. Explain why a salt bridge is usually necessary for the operation of a galvanic cell
I. To allow the electron to flow from anode to cathode.
II. To complete the circuit
III. To maintain the electrical neutrality of both electrolytes.
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