Chemistry Multiple Choice Questions Scrambled

160 Questions | Total Attempts: 333

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Chemistry Multiple Choice Questions Scrambled

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Questions and Answers
  • 1. 
    Why is it easier to remove an electron from potassium than it is to remove an electron from calcium?
    • A. 

      Potassium has a higher electron affinity

    • B. 

      Potassium has a higher ionization energy

    • C. 

      Potassium has a lower nuclear charge

    • D. 

      Calcium has a lower electron affinity

    • E. 

      Calcium is a metal, but potassium is not

  • 2. 
    Why does electron affinity increase from bottom to top in a chemical family?
    • A. 

      Nuclear charge increases from bottom to top in a chemical family

    • B. 

      Nuclear charge decrease from bottom to top in a chemical family

    • C. 

      The number of energy levels increases from bottom to top in a chemical family

    • D. 

      The number of energy levels decreases from bottom to top in a chemical family

    • E. 

      The number of electrons increases from bottom to top in a chemical family

  • 3. 
    Why does atomic radius decrease from left to right in a period?
    • A. 

      Nuclear charge increases from left to right in a period

    • B. 

      Nuclear charge decreases from left to right in a period

    • C. 

      The number of energy levels increase from left to right in a period

    • D. 

      The number of energy levels decreases from left to right in a period

    • E. 

      The number of electrons decreases from left to right in a period

  • 4. 
    Which term would best describe 40g of NH4Cl dissolved in 100mL of water at 30 degrees celsius?
    • A. 

      Supsersaturated

    • B. 

      Insoluble

    • C. 

      Unsaturated

    • D. 

      Saturated

    • E. 

      Subsaturated

  • 5. 
    Which one of the following statements is a quantitative observation?
    • A. 

      The freezing point of the clear and colourless solution was -40.5 degrees celsius

    • B. 

      The reactant demonstrated a high degree of viscosity

    • C. 

      The overall reaction was exothermic

    • D. 

      The product was yellow in colour

    • E. 

      A brown coloured gas evolved from the test tube

  • 6. 
    Which of the net ionic equation best represents the reaction between silver nitrate and potassium acetate?
    • A. 

      2Ag(aq) + C2H3O2(aq) = AgC2H3O2(s)

    • B. 

      Au(aq) + C2H4O2(aq) = AgC2H3O2(s)

    • C. 

      Ag(aq) + C2H3O2(AQ) = AgC2H3O2(s)

    • D. 

      Ag(aq) + C2H3O2^2-(aq) = AgC2H3O2(S)

    • E. 

      Ag(aq) + C2C2H3O2^-(aq) = AgC2H3O2

  • 7. 
    Which of the following would not precipitate the CO3 ion?
    • A. 

      Co

    • B. 

      H

    • C. 

      Mg

    • D. 

      Ba

    • E. 

      Pb

  • 8. 
    Which of the following processes occur during the tertiary treatment of wastewater?
    • A. 

      Reverse osmosis

    • B. 

      Steam distillation

    • C. 

      Chemical precipitation

    • D. 

      All of the above

    • E. 

      None of the above

  • 9. 
    Which of the following mixtures is homogeneous?
    • A. 

      Orange juice from concentrate

    • B. 

      Milk

    • C. 

      Clay in water

    • D. 

      Sand and rocks

    • E. 

      Jello

  • 10. 
    Which of the following metals would most likely oxidize if a clean metal surface is exposed to the atmosphere?
    • A. 

      Aluminum

    • B. 

      Iron

    • C. 

      Gold

    • D. 

      Silver

    • E. 

      Zinc

  • 11. 
    Which of the following matches of group number and common name is incorrect?
    • A. 

      Group 7 - Transition Metals

    • B. 

      Group 2 - Alkali Earth Metals

    • C. 

      Group 17 - Halogens

    • D. 

      Group 2 - Actinides

    • E. 

      Group 18 - Noble Gases

  • 12. 
    Which of the following matches of group number and common name is incorrect?
    • A. 

      Group 2 - Alkaline Earth Metals

    • B. 

      Group 6 - Lanthanides

    • C. 

      Group 1 - Alkali Metals

    • D. 

      Group 17 - Halogens

    • E. 

      Group 18 - Noble Gases

  • 13. 
    Which of the following laws states that volume and temperature (in Kelvin) of a gas are directly proportional at constant pressure and number of molecules?
    • A. 

      Boyle's Law

    • B. 

      Charles' Law

    • C. 

      Dalton's Law

    • D. 

      Avogadro's Law

    • E. 

      Gay-Lussac's Law

  • 14. 
    Which of the following is true for hydrochloric acid?
    • A. 

      HCl = H + Cl (

    • B. 

      It is a weak acid

    • C. 

      HCl = H + Cl (>99%)

    • D. 

      HCl = H + Cl (>50%)

    • E. 

      HCl = H + Cl (

  • 15. 
    Which of the following is the proper dot diagram for NaCl?
    • A. 

      Refer to the test for this question

    • B. 

      Option 2

    • C. 

      Option 3

    • D. 

      Option 4

  • 16. 
    Which of the following is the most reactive element?
    • A. 

      Helium

    • B. 

      Radon

    • C. 

      Francium

    • D. 

      Hydrogen

    • E. 

      Ununoctium

  • 17. 
    Which of the following is the correct representation for a hydronium ion?
    • A. 

      H

    • B. 

      H3O

    • C. 

      H2O

    • D. 

      H4O

    • E. 

      None of the above

  • 18. 
    Which of the following is the correct net ionic equation for barium sulphate?
    • A. 

      Ba(aq) + S(aq) = BaS(s)

    • B. 

      B(aq) + SO3(aq) = BSO3(s)

    • C. 

      Be(aq) + SO4(aq) = BeSO4(s)

    • D. 

      Ba(aq) + SO4(aq) = BaSO4(s)

    • E. 

      None of the above

  • 19. 
    Which of the following is the correct dissociation reaction for calcium hydroxide?
    • A. 

      Ca(OH)2 = Ca + 2OH

    • B. 

      CaOH = Ca + OH

    • C. 

      Ca(OH)2 = 2Ca + OH

    • D. 

      Ca(OH)3 = Ca + 3OH

    • E. 

      Ca(OH)2 = 2Ca + 2OH

  • 20. 
    Which of the following is not always conserved in a chemical reaction?
    • A. 

      Total number of atoms

    • B. 

      Total number of molecules

    • C. 

      Mass

    • D. 

      Energy

    • E. 

      None of the above are conserved

  • 21. 
    Which of the following is not a solution?
    • A. 

      Oxygen in water

    • B. 

      Tin in copper (bronze)

    • C. 

      Sand in water

    • D. 

      Sugar in water

    • E. 

      Sea water

  • 22. 
    Which of the following is NOT a property of acids?
    • A. 

      They taste sour

    • B. 

      They have a pH less than 7

    • C. 

      They react with metals

    • D. 

      They do not react with carbonates

    • E. 

      They turn blue litmus red

  • 23. 
    Which of the following is a practical use of radioisotopes?
    • A. 

      Determining the age of old objects

    • B. 

      Medical diagnosis

    • C. 

      Production of electricity

    • D. 

      All of the above

    • E. 

      None of the above

  • 24. 
    Which of the following is a common source of water contamination?
    • A. 

      Landfill leachate

    • B. 

      Agricultural fertilizers and pesticides

    • C. 

      Road salt runoff

    • D. 

      Mining and mine tailings

    • E. 

      All of the above

  • 25. 
    Which of the following has a concentration of 2mol/L
    • A. 

      2mol/1L

    • B. 

      2mol/1000mL

    • C. 

      5mol/2.5L

    • D. 

      2mol/2L

    • E. 

      A, B, and C only

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