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.
Choose the correct option: Electrolytes conduct electricity due to the movement of _________.
1. electrodes 2. atoms 3. ions 4. None of these
2.
Choose the correct option: An electrolyte is ___________.
1. a metal 2. a solution 3. a liquid that conducts current 4. None of these
3.
Fill in the blanks: Electroplating is used to give more ___________ to the cheap objects.
4.
Fill in the blanks: LED glows even when a __________ electric current passes through it.
5.
State True or False: The chemical effect of electric current is used in the purification of salts.
1. true 2. false
6.
State True or False: Adding sugar makes pure water conducting.
1. true 2. false
7.
State True or False: Distilled water is poor conductor of electricity.
1. true 2. false
8.
State True or False: Electrolysis is a chemical change.
1. true 2. false
9.
Which form of energy conversion takes place in electric cell?
10.
Which substance is produced by the electrolysis of an aqueous solution of sodium chloride?
1. Sodium carbonate 2. Sodium bicarbonate 3. Sodium hydrogen carbonate 4. Sodium hydroxide

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