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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Faraday's laws of electrolysis

Jamb Physics Questions - Faraday's laws of electrolysis

Question 1:
In an electrolysis experiment, a cathode of mass 5g is found o weigh 5.01g after a current of 5A flows for 50 seconds. What is the electrochemical equivalent of the deposited substance?
  • A 0.00004g/C
  • B 0.00002g/C
  • C 0.02500g/C
  • D 0.05000g/C
  • E 0.00001g/C
View Answer & Explanation
Question 2:
The electrochemical equivalent of silver is 0.0012gC-1. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5.0mins, the current must be
  • A 6000A
  • B 100A
  • C 10A
  • D 1A
View Answer & Explanation
Question 3:
The electrochemical equivalent of platinum is 5.0 x 10-7kgC-1 to plate-out 1.0kg of platinum, a current of 100A must be passed through an appropriate vessel for
  • A 5.6 hours
  • B 56 hours
  • C 1.4 x 10<sup style='font-size: smaller;'>4 hours</sup>
  • D 2.0 x 10<sup style='font-size: smaller;'>4 hours</sup>
View Answer & Explanation
Question 4:
A current of 100mA passes through a conductor for 2 minutes. The quantity of electricity transported is
  • A 200C
  • B 50C
  • C 12C
  • D 0.002C
View Answer & Explanation
Question 5:
The electrochemical equivalent of a metal is 1.3 x 10-7kgC-1. The mass of the metal which 2.0 x 104C of electricity will deposit from a suitable electrolyte is
  • A 6.5 x 10<sup style='font-size: smaller;'>-2</sup>kg
  • B 2.6 x 10<sup style='font-size: smaller;'>-2</sup>kg
  • C 6.5 x 10<sup style='font-size: smaller;'>-3</sup>kg
  • D 2.6 x 10<sup style='font-size: smaller;'>-3</sup>kg
View Answer & Explanation