CBSE Class 8 Science Worksheet - Chemical Effect of Electric Current Part B

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CHEMICAL EFFECTS OF ELECTRIC CURRENT

I. Write answer for the following as directly :

1. What is LED ?

2. Name a gas which burns with a pop sound.

3. Which electrode is connected to the negative terminal of a cell ?

4. Name the ions which are positively charged.

5. Name a device which is used for the electrolysis of water ?

6. Write a chemical equation for the electrolysis of water.

II Answer the following in 2 or 3 lines :

1. Define the following :

a) Electrolyte b) Cathode c) Anode d) Jons e) Voltameter

2. What is electroplating ?

3. Draw a neat diagram of voltameter and label it

4. Identify the following as electrolytes and non electrolytes :

a) dil HNo3 b) Benzene c) Petrol d) Zinc Chloride solution e) a solution of Naoh g) Ether h) Alcohol i) Common salt solution

5. State three uses of electrolysis.

III Define the following in detail :

1. Describe an experiment to show chemical effect of electric current.

2. Describe an experiment for the electroplating of an iron object with copper.


Please refer to attached file for CBSE Class 8 Science Worksheet - Chemical Effect of Electric Current Part B

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