C2.5 Effect of an Electric Current on Substances

1. A substance which does not allow an electric current to pass through them is called

2. Why is Graphite the most commonly used electrode?

3. Which of the following metals are conductors of electricity?

4. An ionic substance such as Lead (II) bromide and lead (II) iodide does not conduct electricity in a solid-state but conducts electricity in the molten state. True or False

5. Which of the following statement is correct about the electrical conductivity of substances in aqueous solutions?

6. Which of the following is not an electrolyte

7. Explain why graphite is a non-metal but it conducts an electric current

8. The processing of decomposing an electrolyte by passing an electric current through it is called

9. What is responsible for the electrical conductivity of metals and graphite?

10. An electrolyte is a substance which when melted or dissolved in water conducts are electric current and gets decomposed by the current True or False

11. Why is an aqueous solution of salts, bases and acids able to conduct electricity?

12. When an electrolyte is electrolyzed the cations move to

13. Define a binary electrolyte

14. A substance that allows an electric current to pass through them is called

15. When an electrolyte is electrolyzed, the positive ions always move to the negatively charged cathode where they gain electrons to form neutral atoms. True or False

16. A molecular substance such as sugar, Sulphur and wax do not conduct electricity in what state of matter

17. When an electrolyte is electrolyzed, the negatively charged ions always move to the positively charged anode where they lose electrons to form neutral atoms. True or False

18. The electrode connected to the positive terminal of the battery is called

19. The electrode connected to the negative terminal of the battery is called

20. When an electrolyte is electrolyzed the anions move to