Free CBSE Class 8 Science Chemical effects of Electric Current Worksheets

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Sample CBSE Class 8 Science Chemical effects of Electric Current Worksheet Questions

1.
What happens when a compass needle is brought near a current carrying wire?
2.
Fill in the blanks: The bulb glows when electric current passes through it because of ___________ effect of electric current.
3.
Choose the correct option: During electroplating, the object to be electroplated is made _________.
1. cathode 2. anode 3. Electrolyte 4. None of these
4.
State True or False: Adding lemon in water,makes it a good conducter of electricity.
1. true 2. false
5.
Sometimes we see that the liquid is conducting but the bulb may not glow. Why?
6.
The chemical reaction brought about by an electric current may produce changes in the colour of the solutions.
1. TRJUE 2. false
7.
Fill in the blanks: LED glows even when a __________ electric current passes through it.
8.
State True or False: The chemical effect of electric current is used in the purification of salts.
1. true 2. false
9.
State True or False: Adding sugar makes pure water conducting.
1. true 2. false
10.
State True or False: Distilled water is poor conductor of electricity.
1. true 2. false

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