18 Questions
What is the process of decomposition of an electrolyte using electricity called?
Electrolysis
Which material is commonly used to make electrodes for electrolysis?
Platinum
What type of changes occur at the electrodes during electrolysis?
Chemical changes
What is the purpose of electroplating?
To enhance appearance
In the electrolysis of water, what gas is liberated at the cathode?
Hydrogen gas
What happens when an electric current passes through an electrolyte?
Chemical changes occur
Which factor does not affect the amount of substance deposited during electrolysis?
Temperature of the electrolyte
Which type of material is best suited for making electrodes in electrolysis?
Platinum
What causes the sound known as thunder during a lightning discharge?
Intense heating and rapid cooling of the air around the lightning bolt
Which natural phenomenon is characterized by the shaking of the ground?
Earthquake
What is the key safety measure advised during a lightning storm?
Taking cover indoors
What is Benjamin Franklin's notable contribution related to lightning?
Understanding of lightning and invention of lightning rod
How is static electricity generated on objects?
Through the accumulation of electric charge on their surfaces from electron transfer
What is the purpose of discussing safety precautions during thunderstorms and earthquakes?
To ensure safety and preparedness during natural disasters
How are conductors and insulators relevant to lightning safety and electrical circuits?
Conductors allow electricity to flow easily, which can be dangerous during lightning strikes
Why is it important to unplug electronic devices during storms?
To prevent electrical hazards and damage due to power surges
How does rubbing a balloon against hair demonstrate static electricity?
By creating a build-up of charges on the balloon and hair
In terms of electricity flow, what differentiates conductors from insulators?
Insulators restrict the movement of electricity, while conductors facilitate it
Test your knowledge on the chapter 'Chemical Effects of Electric Current' for Class VIII. Learn about conduction of electricity, electrolysis, and electrodes.
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