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

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

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

5. When an electrolyte is electrolyzed the anions move to

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

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

8. Why is Graphite the most commonly used electrode?

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

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

11. When an electrolyte is electrolyzed the cations move to

12. 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

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

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

15. Define a binary electrolyte

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

17. Which of the following is not an electrolyte

18. 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

19. 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

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