C2.5 Effect of an Electric Current on Substances

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

2. When an electrolyte is electrolyzed the cations move to

3. 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

4. Define a binary electrolyte

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

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

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

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

9. Which of the following is not an electrolyte

10. Why is Graphite the most commonly used electrode?

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

12. 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

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

14. 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

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

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

17. When an electrolyte is electrolyzed the anions move to

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

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