Direction: Read carefully the given statements. Determine whether oxidation or reduction is described. Write your answer on the space provided. 1. An element changes oxidation number +5 to +2. 2. Oxygen attained oxidation number of 0 from -2. 3. Hydrogen have an initial oxidation of +1 and later had 0 after the reaction. 4. An element losses 2 electrons after a reaction. 5. Chlorine reaches -1 charge after gaining an electron.
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Direction: Read carefully the given statements. Determine whether oxidation or reduction is described. Write your answer on the space provided.
1. An element changes oxidation number +5 to +2.
2. Oxygen attained oxidation number of 0 from -2.
3. Hydrogen have an initial oxidation of +1 and later had 0 after the reaction.
4. An element losses 2 electrons after a reaction.
5. Chlorine reaches -1 charge after gaining an electron.
6. An element undergoes change of oxidation number from +3 to 0.
7. Copper changes from +2 to 0.
8. From Cl2 having 0 as oxidation number, Cl later had -1 after combining with Na.
9. Lithium from its free state to LiCl.
10. Carbon in CH4 before combustion and Carbon in CO2 after combustion.
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