The Officials Chm101 CBT Practice

35 Questions | Total Attempts: 403

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The Officials Chm101 CBT Practice


Questions and Answers
  • 1. 
    Molarity is defined as ______
    • A. 

      Moles of solute per liter of solution

    • B. 

      Moles of solute per litre of solvent

    • C. 

      Moles of solvent per liter of solution

    • D. 

      Moles solvent per liter of solvent

  • 2. 
    The Element that best describes Alpha decay is? 
    • A. 

      Helium

    • B. 

      Sodium

    • C. 

      Calcium

    • D. 

      Methane

  • 3. 
    What is the name of the CEO of The Officials Educational consult? 
    • A. 

      Femi Ajewole

    • B. 

      Williams David

    • C. 

      King Adewole David

    • D. 

      Oyewole Kolawole David 

  • 4. 
    What is the Mass number of Na? 
  • 5. 
    What is the oxidation number of the chromium atom in K2Cr2O7
    • A. 

      -2

    • B. 

      +3

    • C. 

      +6

    • D. 

      +7

  • 6. 
    How many grams of KNO3 are needed to make 250ML of a solution that is 0.135M
    • A. 

      1.71g

    • B. 

      0.341g

    • C. 

      3.41g

    • D. 

      6.82g

  • 7. 
    Of the following, which element has the highest first ionization energy
    • A. 

      Iodine

    • B. 

      Bromine

    • C. 

      Fluorine

    • D. 

      Chlorine

  • 8. 
    Isotopes have the same number of __________ but different numbers of ___________ in their nuclei
    • A. 

      Electron, neutron

    • B. 

      Protons, neutrons 

    • C. 

      Protons, electrons

    • D. 

      Nucleon, neutron

  • 9. 
    Which of the following is not an Arrhenius acid? 
    • A. 

      HF

    • B. 

      KOH

    • C. 

      HCLO

    • D. 

      H2SO3

  • 10. 
    Which of the following can be classified as a weak base? 
    • A. 

      CH3NH2

    • B. 

      NH2OH

    • C. 

      Both CH3NH2 and NH2OH

    • D. 

      Neither A nor B

  • 11. 
    Which of the following can be interpreted as a measure of randomness
    • A. 

      Enthalpy

    • B. 

      Entropy

    • C. 

      Free Energy

    • D. 

      Temperature 

  • 12. 
    The energy of motion is
    • A. 

      Electrical Energy 

    • B. 

      Dam energy 

    • C. 

      Reserve energy

    • D. 

      Kinetic Energy

  • 13. 
    What is the minimum energy barrier that must be overcome for a chemical reaction to occur
    • A. 

      Activation Energy 

    • B. 

      Net energy 

    • C. 

      Potential energy 

    • D. 

      Rate limiting energy

  • 14. 
    What is the overall reaction order for the reaction that has the rate law: k[H2] [NO] 2
    • A. 

      Zero order

    • B. 

      First order

    • C. 

      Second order

    • D. 

      Third order

  • 15. 
    A catalyst increases the rate of reaction by providing a different reaction pathway that
    • A. 

      Lowers only the activation Energy 

    • B. 

      Raises only the energy of the products

    • C. 

      Lowers only the energy of the reactants and products

    • D. 

      All of these are affected by the presence of a catalyst

  • 16. 
    The number of nucleons in an atom or ion is the same as the 
    • A. 

      Atomic Number

    • B. 

      Charge on the atom or ion

    • C. 

      Mass Number

    • D. 

      None of these

  • 17. 
    The binding energy is defined as 
    • A. 

      The amount of energy absorbed when electrons are added to an ion. 

    • B. 

      The amount of energy absorbed when protons and neutrons form a nucleus 

    • C. 

      The amount of energy released when electrons are removed from the atom

    • D. 

      The amount of energy required to break apart a nucleus into individual protons and neutrons

  • 18. 
    Elements with ___________ atomic mass are best possible candidates for a fusion reaction
    • A. 

      Very low

    • B. 

      Moderate

    • C. 

      Moderate to heavy

    • D. 

      Very heavy

  • 19. 
    Radiation is detected by its ___________ properties
    • A. 

      Gravitational 

    • B. 

      Ionizing

    • C. 

      Kinetic

    • D. 

      Thermal

  • 20. 
    What is the field of the CEO of The Officials Educational consult? 
    • A. 

      Mass Communication 

    • B. 

      Computer Engineering 

    • C. 

      Mechatronics Engineering 

    • D. 

      Pure Chemistry 

  • 21. 
    The effect of ionizing radiation depend on 
    • A. 

      Length of exposure to radiation 

    • B. 

      Location of source (internal or external) 

    • C. 

      Type and energy of radiation 

    • D. 

      All of the above

  • 22. 
    Who is the Dean of Faculty of Science in Fuoye
    • A. 

      Dr. Lawal

    • B. 

      Dr. Malomo

    • C. 

      Dr. Okolo

    • D. 

      Dr. Shakirudeen

  • 23. 
    What is the mole fraction of ethanol in a solution made by dissolving 25g of ethanol, C2H5OH, in 53.6g of Water? 
    • A. 

      0.154

    • B. 

      0.846

    • C. 

      0.214

    • D. 

      0.272

  • 24. 
    What is the expected freezing point of a 0.50m solution of Na2CO3 in water? Kf for water is 1.86°C/m
    • A. 

      -0.93°C

    • B. 

      -1.9°C

    • C. 

      -2.8°C

    • D. 

      -6.5°C

  • 25. 
    Which cell involves a non-spontaneous redox reaction? 
    • A. 

      Concentration cell

    • B. 

      Electrolytic Cell

    • C. 

      Fuel Cell

    • D. 

      Galvanic cell

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