class 8
cell stucture

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. 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

7. State three uses of electrolysis.

8. Draw a neat diagram of voltameter and label it