Chemical Effects of Electric Current Full Chapter Class 8 Science | NCERT Science Class 8 Chapter 14
Magnet Brains・23 minutes read
The text discusses the effects of electric current on chemical reactions, conductivity in liquids like water and lemon juice, and applications of electroplating in preventing rust and corrosion on metals. It also highlights the use of electric current to improve conductivity in wires, conduct experiments with various substances, and test the conductivity of liquids.
Insights
- Metals are excellent conductors of electricity, while distilled water lacks ions necessary for conducting electricity.
- Electroplating serves to protect metals from rust and corrosion, with applications ranging from car parts to artificial jewelry, showcasing its diverse utility and significance in various industries.
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Recent questions
Can distilled water conduct electricity?
No
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Summary
00:00
Chemical Effects of Electric Current Explained
- The text discusses the chemical effects of electric current and whether any chemical reactions occur by passing electricity or laxatives.
- It mentions the difference between conductors and insulators, highlighting metals as good conductors of electricity.
- The text explores the concept of liquids conducting electricity, using examples like water and lemon juice.
- It explains the use of batteries and connecting wires to test the conductivity of liquids like lemon juice.
- The text delves into experiments involving magnetic compasses and circuits to demonstrate the effects of electric current.
- It discusses the conductivity of distilled water and the absence of ions preventing it from conducting electricity.
- The text mentions the presence of ions in substances like saltwater allowing them to conduct electricity.
- It describes experiments involving carbon rods, copper wires, and potatoes to observe chemical reactions due to electric current.
- The text introduces the concept of electroplating, using copper sulphate solution and electrodes to deposit copper on a plate.
- It explains the purpose of electroplating in protecting metals from rust and corrosion, providing examples like bicycle handles and kitchenware.
22:18
"Electroplating: Applications and Conductivity Testing"
- Electroplating prevents the electroplating of any other metal, avoiding too much launch.
- Applications of electroplating include chromium plating on car parts for scratch resistance and a shiny appearance.
- Electroplating is used in making artificial jewelry by layering gold on cheap metal.
- Iron objects are coated with zinc to prevent rusting, a process known as galvanization.
- Electric current is used to improve conductivity in wires and circuits.
- Conductivity of liquids like water, lemon juice, and vegetable oil is tested using electric current.
- Pure water can conduct electricity when mixed with sodium chloride.
- Rainwater can conduct electricity and should be avoided when working with electrical appliances during heavy downpours.
