( 15. Write equations to show how carbon dioxide reacts with
Sodium hydroxide solution and state what would be
observed. (1 mark)
16. Name one process in each case by which the concentration
of carbon (IV) oxide in the atmosphere is
(a) Increased. (1 mark)
(b) Decreased. (1 mark)
21.1
2
17. (a) What is amorphous carbon. (1 mark)
(b) Give examples of amorphous carbon. (2 marks)
(C) State three uses of amorphous carbon. (3 marks)
18. (a) State three physical properties of carbon (IV) oxide.
(3 marks)
(b) State the uses of carbon (IV) oxide. (2 marks)
19. State two physical properties of carbon (II) oxide.
(2 marks)
20. Experiment was set as shown below.
To the​