Physical Chemistry - Electrochemistry
Q. In an electrochemical cell, the anode is where: (2019)
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A.
Oxidation occurs
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B.
Reduction occurs
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C.
Electrons are gained
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D.
Ions are produced
Solution
In an electrochemical cell, oxidation occurs at the anode.
Correct Answer: A — Oxidation occurs
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Q. Which of the following ions is commonly used in a salt bridge? (2020)
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A.
Na+
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B.
Cl-
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C.
K+
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D.
Ca2+
Solution
Potassium ions (K+) are commonly used in salt bridges to maintain electrical neutrality.
Correct Answer: C — K+
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Q. Which of the following statements is true about a galvanic cell? (2020)
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A.
It converts chemical energy to electrical energy
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B.
It requires an external power source
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C.
It is always non-spontaneous
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D.
It operates at constant temperature only
Solution
A galvanic cell converts chemical energy into electrical energy spontaneously.
Correct Answer: A — It converts chemical energy to electrical energy
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