C2.5 Effect of an Electric Current on Substances

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

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

3. When an electrolyte is electrolyzed the anions move to

4. Which of the following is not an electrolyte

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. 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

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

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

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

10. 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

11. 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

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

13. When an electrolyte is electrolyzed the cations move to

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

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

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

17. Define a binary electrolyte

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

19. Why is Graphite the most commonly used electrode?

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