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I. OBJECTIVE TEST
1. Look at the following statement!
1. Oxidation is a process in which of oxygen atom is loss from compound.
2. Reduction is process in which electron is loss from compound
3. Reduction is decrease of oxidation number.
4. Oxidation form cation and anion
5. Reduction to form anode and oxide
The correct statement shown by number….
A. 1, 2 and 3 D. 4
B. 1 and 3 E. 1, 2, 3 and 4
C. 2 and 4
2. The highest oxidation of Cl is found in….
A. calcium chloride D. diclorin trioxides
B. sodium chloride E. barium hypochlorite
C. potassium per chlorite
3. Oxydator and product of oxidation from this reaction is….
3HgS + 2HNO3 + 6 HCl ¾→ HgCl2 + S + NO + H2O
A. Hg S and S D. HNO3 and Hg Cl
B. HNO3 and S E. H Cl and S
C. HNO3 and NO
4. The parameter that shown the size of pure quality of the water is….
A. low DO, low BOD, pH = 7 D. low DO, low BOD, pH < 7
B. High DO, low BOD, pH = 7 E. high DO, low BOD, pH > 7
C. low DO, high BOD, pH = 7
5. Cl element which has oxidation number same as oxidation number of N in the HNO3 is....
a. KClO4 d. Cl2O7
b. KClO3 e. Cl2O5
c. KClO2
6. Look at the following reaction:
3I2 + 6KOH → 5KI + KIO3 + 3H2O
The oxidator and reductor of the reaction, in a sequence is/are....
a. I2 d. I2 and KI
b. KOH e. KIO3 and H2O
c. KIO3 and KI
7. Look at the following table:
Number | Chemical formula | The nomenclatur |
1. | SnSO4 | Stannum(II) sulphate |
2. | Cu2S | Cuprum(I) sulfide |
3. | Fe(OH)2 | Ferro hidroxide |
4. | N2O5 | Nitrogen(V) oxide |
The true statement/statements is/are number….
a. 1, 2, 3 d. 4
b. 1, 3 e. 1, 2, 3, 4
c. 2, 4
8. There are some statements about activated sludge (lumpur aktif):
1. There are filtration and sedimentation processes in the primary step
2. Decreasing of BOD happens in the secondary step
3. Sterilization process happens in the tertiary step
4. Application of redox happens in the secondary step
The true statement/statements is/are....
a. 1, 2, 3 d. 4
b. 1, 3 e. 1, 2, 3, 4
c. 2, 4
9. Cl element which has oxidation number same as oxidation number of N in the HNO3 is....
a. KClO4 d. Cl2O7
b. KClO3 e. Cl2O5
c. KClO2
10. There are some reaction equation:
1. Zn + 2HCl → ZnCl2 + H2
2. 2 H2 + O2 → 2H2O
3. H2 + 2Na → 2NaH
4. 2H2O2 → 2H2O + O2
Hydrogen atom with constant oxidation number is happened in the reaction number….
a. 1 dan 2 d. 2
b. 1 dan 3 e. 4
c. 2 dan 4
11. Look at the following reaction:
3I2 + 6KOH → 5KI + KIO3 + 3H2O
The oxidator and reductor of the reaction, in a sequence is/are....
a. I2 d. I2 and KI
b. KOH e. KIO3 and H2O
c. KIO3 and KI
12. Look at the following table:
Number | Chemical formula | The nomenclatur |
1. | SnSO4 | Stannum(II) sulphate |
2. | Cu2S | Cuprum(I) sulfide |
3. | Fe(OH)2 | Ferro hidroxide |
4. | N2O5 | Nitrogen(V) oxide |
The true statement/statements is/are number….
a. 1, 2, 3 d. 4
b. 1, 3 e. 1, 2, 3, 4
c. 2, 4
13. Product of oxidation and product of reduction of the reaction below are….
MnO2 + 2NaCl + 2H2SO4 → MnSO4 + Na2SO4 + 2H2O + Cl2
a. MnO2 and MnSO4 d. NaCl and Cl2
b. Cl2 and MnSO4 e. MnO2 and Cl2
c. NaCl and Na2SO4
14. There are some statements about activated sludge (lumpur aktif):
1. There are filtration and sedimentation processes in the primary step
2. Decreasing of BOD happens in the secondary step
3. Sterilization process happens in the tertiary step
4. Application of redox happens in the secondary step
The true statement/statements is/are....
a. 1, 2, 3 d. 4
b. 1, 3 e. 1, 2, 3, 4
c. 2, 4
15. Look at the following statements!
1. increasing (kenaikan) of positive charge (muatan)
2. releasing (pelepasan) of oxygen
3. increasing of oxidation number (bilangan oksidasi)
4. decreasing (penurunan) of positive charge
5. releasing of electron
The statements which are suitable with reduction concept are number....
a. 2, 4 d. 1, 3, 5
b. 3, 4 e. 2, 4, 5
c. 2, 3, 4
16. Cl element which has oxidation number same as oxidation number of N in the HNO2 is....
a. KClO4 d. Cl2O7
b. KClO3 e. Cl2O5
c. KClO2
17. Look at the following reaction:
3I2 + 6KOH → 5KI + KIO3 + 3H2O
The product of oxidation and product of reduction of the reaction, in a sequence is/are....
a. I2 d. I2 and KI
b. KOH e. KIO3 and H2O
c. KIO3 and KI
18. Look at the following table:
Number | Chemical formula | The nomenclatur |
1. | Sn(SO4)2 | Stannum(II) sulphate |
2. | Cu2S | Cuprum(I) sulfide |
3. | Fe(OH)3 | Ferro hidroxide |
4. | N2O5 | Nitrogen(V) oxide |
The true statement/statements is/are number….
a. 1, 2, 3 d. 4
b. 1, 3 e. 1, 2, 3, 4
c. 2, 4
19. Oxidator and product of oxidation (hasil oksidasi) of the reaction below are….
MnO2 + 2NaCl + 2H2SO4 → MnSO4 + Na2SO4 + 2H2O + Cl2
a. MnO2 and MnSO4 d. NaCl and Cl2
b. NaCl and MnSO4 e. MnO2 and Cl2
c. NaCl and Na2SO4
20. There are some statements about activated sludge (lumpur aktif):
1. There are filtration and sedimentation processes in the secondary step
2. Decreasing of BOD happens in the primary step
3. Sterilization process happens in the primary step
4. Application of redox happens in the secondary step
The true statement/statements is/are....
a. 1, 2, 3 d. 4
b. 1, 3 e. 1, 2, 3, 4
c. 2, 4
21. Look at the following statements!
1. increasing (kenaikan) of positive charge (muatan)
2. releasing (pelepasan) of oxygen
3. increasing of oxidation number (bilangan oksidasi)
4. decreasing (penurunan) of positive charge
5. releasing of electron
The statements which are suitable with oxidation concept are number....
a. 1, 2, 4 d. 1, 3, 5
b. 1, 3, 4 e. 2, 4, 5
c. 2, 3, 4
22. Mn element which has oxidation number same as oxidation number of Cr in the K2Cr2O7 is....
a. KMnO4 d. MnO
b. K2MnO4 e. MnO2
c. MnSO4
23. Look at the following reaction:
3I2 + 6KOH → 5KI + KIO3 + 3H2O
The oxidator and reductor of the reaction is/are....
a. I2 d. I2 and KI
b. KOH e. KIO3 and H2O
c. KI and KIO3
24. Look at the following table:
Number | Chemical formula | The nomenclatur |
1. | Sn(SO4)2 | Stannum(IV) sulphate |
2. | Cu2S | Cuprum(I) sulfide |
3. | Fe(OH)3 | Ferri hidroxide |
4. | N2O5 | Nitrogen(V) oxide |
The true statement/statements is/are number….
a. 1, 2, 3 d. 4
b. 1, 3 e. 1, 2, 3, 4
c. 2, 4
25. There are some statements about activated sludge (lumpur aktif):
1. There are filtration and sedimentation processes in the primary step
2. Decreasing of BOD happens in the secondary process
3. Sterilization process happens in the tertiary step
4. Application of redox happens in the secondary step
The true statement/statements is/are....
a. 1, 2, 3 d. 4
b. 1, 3 e. 1, 2, 3, 4
c. 2, 4
II. ESSAY TEST
1. Determine the kind of reaction (redox/non redox)!
a. Zn + 2HCl ¾® ZnCl2 + 2HCl + S
b. 2FeCl3 + H2S ¾® FeCl2 + 2HCl + S
c. CaCO3 + 2HCl ¾® CaCl2 + H2O + CO2
d. 2S + 3O2 ¾® 2SO3
e. SnCl2 + 2HgCl2 ¾® SnCl4 + Hg2Cl2
2. Determine: redactor, oxidator, product of oxidation and product of reduction of the reaction below!
MnO2 + 2NaCl + 2H2SO4 → MnSO4 + Na2SO4 + 2H2O + Cl2
3. Explain the development of redox concept!
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