Question

18. Which of the following reactions show evolution
19. Name 2 metals which at tarnished. Why does this happen?
20. Why is corrosion harmful?
21. Mention three situations in daily life where a chemical change occurs.
22. Balance the following chemical equations.
23. Write chemical equations for the following word equations:
a. Hydrogen + Chlorine Hydrogen Chloride
b. Sodium + Water Sodium Hydroxide + Hydrogen
C. Zinc Oxide + Carbon Zinc + carbon monoxide​

Answer 1

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