C2.5 Effect of an Electric Current on Substances

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

2. 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

3. Why is Graphite the most commonly used electrode?

4. When an electrolyte is electrolyzed the cations move to

5. 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

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

7. When an electrolyte is electrolyzed the anions move to

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

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

10. Which of the following is not an electrolyte

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

12. Define a binary electrolyte

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

14. 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

15. 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

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

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

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

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

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