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NCERT Solutions for Class 8 Science Chapter 14: Chemical Effects of Electric Current

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In this chapter, we will study about the various chemical effects of electric current. The chapter begins with examples and experiments to determine whether liquids can conduct electricity. The chapter goes on to test the chemical effects of electric current through experiments involving electrodes. The chapter concludes by telling us about electroplating and its application in our everyday lives and also in various industries.

  • In this chapter, we learn that some liquids are good conductors of electricity and other liquids are bad conductors of electricity.
  • Solutions of acids, bases, and salts are good conductors of electricity.
  • The passage of an electric current passing through a liquid causes chemical reactions.
  • The resulting effects of this process are called chemical effects of electric currents.
  • The most elaborate experiment given to show this phenomenon is the experiment with two carbon rods and electrodes.
  • The experiment shows the formation of oxygen and hydrogen bubbles on the electrodes' positive and negative terminals, respectively.
  • This is achieved when the current is passed through the rods.
  • Depositing one layer of material on another material with the help of electricity is called electroplating.
  • Electroplating is widely used in industries.
  • It is also used in applying a layer of gold and silver on less valuable metals.
  • In particular, we learn about electroplating in chromium, tin cans, and iron.
  • However, electroplating also creates a lot of environmental pollution
  • Strict guidelines apply to control the harm caused by electroplating.

 

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Also See    
NCERT Solutions for Class 8 Science Chapter 1:Crop Production and Management NCERT Solutions for Class 8 Science Chapter 2: Microorganisms - Friend and Foe NCERT Solutions for Class 8 Science Chapter 3: Synthetic Fibres and Plastic
NCERT Solutions for Class 8 Science Chapter 4: Materials - Metals and Non-Metals NCERT Solutions for Class 8 Science Chapter 5: Coal and Petroleum NCERT Solutions for Class 8 Science Chapter 6: Combustion and Flame
NCERT Solutions for Class 8 Science Chapter 7: Conservation of Plants and Animals NCERT Solutions for Class 8 Science Chapter 8: Cell – Structure and Functions NCERT Solutions for Class 8 Science Chapter 9: Reproduction in Animals
NCERT Solutions for Class 8 Science Chapter 10: Reaching the Age of Adolescence NCERT Solutions for Class 8 Science Chapter 11: Force and Pressure NCERT Solutions for Class 8 Science Chapter 12:Friction
NCERT Solutions for Class 8 Science Chapter 13:Sound NCERT Solutions for Class 8 Science Chapter 15: Some Natural Phenomena NCERT Solutions for Class 8 Science Chapter 16: Light
NCERT Solutions for Class 8 Science Chapter 17: Stars and the Solar System NCERT Solutions for Class 8 Science Chapter 18: Pollution of Air and Water  

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