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Wednesday, 7 October 2015

CHEMICAL EFFECTS OF ELECTRIC CURRENT test paper

                 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.

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