CBSE Class 8 Science Chemical Effects of Electric Current Assignment Set D

CBSE Class 8 Science - Chemical Effects of Electric Current (4)

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CHEMICAL EFFECTS OF ELECTRIC CURENT

Q1. Explain the meaning of a good and bad conductor of electricity with an example.

Q2. Can liquids conduct electricity ? If yes, how ?

Q3. Explain an activity to demonstrate the conductance of electricity in a liquid along with

a labeled diagram.

Q4. Identify the following liquids as conducting or poorly conducting – Lemon juice,

vinegar, tap water , distilled water, vegetable oil, milk.

Q5. We should not touch electrical equipment with wet hands. Explain why ?.

Q6 Does distilled water conduct electricity ? If no, then what can be done to make it a

conductor of electricity.

Q7. Define the terms : Electrolyte, Electrolysis, Anode and Cathode.

Q8. Give reasons –

a. Bridges are made of galvanized iron.

b. Chromium plating is done on car parts, bath taps, wheel rims, etc.

c. Electrolysis of water is carried out using acidulated water.

Q9. List the changes that occur when electric current passes through a conducting

solution.

Q10. What is electroplating ? List some applications of electroplating.

*****

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