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Formation of hydrogen bubbles at the copper plate of a primary cell is called?    

Physics
WAEC 2021

Formation of hydrogen bubbles at the copper plate of a primary cell is called?    

  • A. polarization. 
  • B.  back e.m.f.   
  • C.  electrolysis. 
  • D.  local action.
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Correct Answer: Option A
Explanation

Polarization:The hydrogen bubbles which are clinging over the surface of copper electrode anode becomes a thin film of hydrogen over the copper electrode.

This hydrogen film increases the internal resistance and reduces the emf of the cell and hence the cell soon becomes inactive. This effect is known as polarization


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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
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709