Iesa Tutorial Committee Online Che 156 Pretest

20 Questions | Total Attempts: 35

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Iesa Tutorial Committee Online Che 156 Pretest - Quiz

Instructions: Endeavour to carefully answer the questions and choose your desired option. You have 30 minutes for the test.


Questions and Answers
  • 1. 
    1) Which of this definition does not correctly define oxidation? a. Oxidation is the addition of oxygen to a substance b. Oxidation is the removal of hydrogen from a compound c. Oxidation is the lose of electrons and increase in oxidation number d. Oxidation is the gain of electrons and increase in oxidation number
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 2. 
    2) Which of this correctly defines Reduction? a. Reduction is the increase in oxidation number and gain of electrons b. Reduction is the removal of hydrogen from a compound c. Reduction is the decrease in oxidation number and gain of electrons. d. Reduction is the addition of oxygen to a substance
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 3. 
    3) What is the oxidation number of oxygen in the H₂0, H₂0₂, KO₂, K₂O respectively a. –2, –1, –½, –2 b. 2, –½, –2 , 1 c. –1, 2, –½, –2 d. +½, –1, 1, –2
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 4. 
    4) What is the oxidation number of the metal atom in Fe(CN)₆³⁻? a. –3 b. +2 c. –2 d. +3
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 5. 
    5) The electrical device that produces voltage of known value and measures potential difference in a cell by generating enough voltage to oppose the current in the cell is know as a. Voltmeter b. Potentiometer c. Voltameter d. Galvanometer
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 6. 
    6) To obtain the eletrode potential of a solution process, it is necessary to have a standard reference of measurement. This reference electrode is the __________and it electrode potential must be taken as _________. a. Standard Electrode Potential (SEP) , Zero (0) b. Standard potential electrode (SPE) , One (1) c. Standard potential difference (SPD) , zero (0) d. Standard Hydrogen Electrode (SHE) , Zero (0) e. None of the Above.
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

    • E. 

      E

  • 7. 
    7) Vinegar and Aspirin contains/is respectively a. Acetic Acid and Abscorbic Acid b. Acetylsalicylic Acid and sulphonic Acid c. Acetic Acid and Acetylsalicylic Acid d. Acetylsalicylic Acid, Acetic Acid
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 8. 
    8) Which of this is a triprotic Acid a. NH₃ b. CH₃COOH c. H₃PO₄ d. H₂S
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 9. 
    9) Given the Pka of an Acid to be 3.74 and it is being reacted with by a base at 25°C, what is the Kb of the the Base? a. 5.495 x 10⁻⁵ b. 5. 495 x 10⁻⁴ c. 5.495 x 10⁻¹⁰ d. 5.495 x 10⁻¹² e. None of the Above
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

    • E. 

      E

  • 10. 
    10) NaHC0₃ is also known as a. salt saltpetre b. Liquid Carbonate c. Washing soda d. Baking Soda
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 11. 
    11) The following are pairs of monodentate Ligands a. H₂O and H₂O₂ b. F⁻ and CN⁻ c. NH₃ and H₂O₂ d. CN⁻ and HCl
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 12. 
    12) The hydrogen ion concentration of a solution is 1.3 x 10⁻⁴M. what is the POH of the solution? a. 10.11 b. 9. 29 c. 5.73 d. 5.79
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 13. 
    13) What is the hydroxide ion concentration of pure water? a. 1 x 10⁻⁷M b. 2 x 10⁻⁷M c. 3 x 10⁻⁷M d. 4 x 10⁻⁷M
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 14. 
    14) What is the PH of 0.01M of NaOH at 25°C? a. 13 b. 11 c. 12 d. 9.67
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 15. 
    15) What is correct in the following options below? a. Acidic Solution turn red litmus blue b. Litmus turn red in a basic solution c. Basic Solution turns blue litmus pink d. Litmus turn pink (Red) in an acidic solution
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 16. 
    16) The sequence of elementary steps that leads to product formation is called the..? a. Rate of Reaction b. Reaction Kinetics c. Reaction mechanism d. All of the above e. None of the above
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

    • E. 

      E

  • 17. 
    17) The following factors affect reaction rate except a. Chemical nature of reactants b. Pressure and Volume of reactants c. Catalyst d. Concentration of reactants.
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 18. 
    18) The following are manufactured from the chloro alkali process.. a. NaOH , H₂ , F₂ b. NaOH, F₂, NH₃ c. NaOH , H₂, Cl₂ d. F₂, NH₃ , Cl₂
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 19. 
    19) In the electrosynthesis of Mn02, which is carried out of a solution of _________ and _______ is produced at the inert anode by oxidation on Mn²⁺ respectively? a. MnS0₄ , Mn0₂ b. MnS0₂, Mn0₂ c. Mn0₂, Mn0₄ d. Mn0₂, MnS0₄
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 20. 
    20) The electric eel's head acts as ---------- while its tail acts as  ---------- respectively. a. Cathode and Anode b. Anode and Cathode
    • A. 

      A

    • B. 

      B

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