C2.5 Effect of an Electric Current on Substances

1. 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

2. 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

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

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

5. 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

6. Which of the following is not an electrolyte

7. When an electrolyte is electrolyzed the cations move to

8. Define a binary electrolyte

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

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

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

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

13. 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

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

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

16. When an electrolyte is electrolyzed the anions move to

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

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

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

20. Why is Graphite the most commonly used electrode?