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When a current of 1 .0A flows in an electrolyte for 3.0h, a mass of...

Physics
NECO 2002

When a current of 1 .0A flows in an electrolyte for 3.0h, a mass of 1 .0g is deposited. What mass will be deposited in 10.0h if a current of 3.0A flows through the electrolyte?

  • A. 30.0g
  • B. 24.0g
  • C. 10.0g
  • D. 6.0g
  • E. 0.4g
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Correct Answer: Option C
Explanation

Q = charge
i = current
t = time in sec

Mass(M1)
3hours to sec
60*60*3= 10800
Mass(M2)

10hours to sec
60*60*10 = 36,000
36,000 * 3.0A = 108,000

if it takes 10800 current to discharge 1g
how much will it take 108000

10800---->1
108000---x

= 108000/10800

=10


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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995