C2.5 Effect of an Electric Current on Substances

1. 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

2. 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

3. 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

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

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

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

7. Define a binary electrolyte

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

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

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

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

12. When an electrolyte is electrolyzed the cations move to

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

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

15. 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

16. Why is Graphite the most commonly used electrode?

17. When an electrolyte is electrolyzed the anions move to

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

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

20. Which of the following is not an electrolyte