C2.5 Effect of an Electric Current on Substances

1. 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

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

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

4. Define a binary electrolyte

5. 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

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

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

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

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

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

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

12. When an electrolyte is electrolyzed the anions move to

13. When an electrolyte is electrolyzed the cations move to

14. Which of the following is not an electrolyte

15. Why is Graphite the most commonly used electrode?

16. 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

17. 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

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

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

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