AP Midterm Exam 2012

30 Questions | Total Attempts: 144

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Chemistry Quizzes & Trivia

Questions and Answers
  • 1. 
    How many unpaired electrons are in the Lewis- electron dot symbol for an oxygen atom?
    • A. 

      0

    • B. 

      1

    • C. 

      2

    • D. 

      4

  • 2. 
    Which of the following shows the incorrect number of valence electrons in parentheses?
    • A. 

      Se (4)

    • B. 

      As (5)

    • C. 

      Ca (2)

    • D. 

      Cl (7)

    • E. 

      Li (1)

  • 3. 
    Which of the following exhibits metallic bonding?
    • A. 

      NH3

    • B. 

      Au-Pd alloy

    • C. 

      MgCl2

    • D. 

      PCl3

    • E. 

      O3

  • 4. 
    What is the principal quantum number of the electrons that are lost when tungsten forms a cation?
    • A. 

      2

    • B. 

      6

    • C. 

      5

    • D. 

      4

    • E. 

      3

    • F. 

      1

  • 5. 
    Which of the following processes would be expected to be exothermic?
    • A. 

      K+(g) + Br-(g) -->KBr(s)

    • B. 

      Br2(l) --> Br2(g)

    • C. 

        K(s) --> K(g)

    • D. 

        K(g) --> K+(g) + e-

    • E. 

      Br2(g) --> 2Br(g)

  • 6. 
    In which of the following sets are all of the ions or atoms isoelectronic with each other?    (i)K+, Na+, Mg2+ (ii)Ag+, Cd2+ (iii)Se2-, Te2-, Kr (iv)Ru2+, Rh3+ (v)As3-, Se2-, Br-  
    • A. 

      Ii, iv, and v

    • B. 

      Iv

    • C. 

      Iii

    • D. 

      I

    • E. 

      V

  • 7. 
    In which of the following sets are all of the ions r atoms isolelectronic with one another?   (i)Ba, Lu+, Hf3+ (ii)Nb4+, Y2+, Rb+1 (iii)Te2-, I-, Xe (iv)Br-, Kr, Rb+
    • A. 

      Iii only

    • B. 

      I only

    • C. 

      Iii and iv only

    • D. 

      I and ii only

    • E. 

      Iv only

    • F. 

      Ii only

  • 8. 
    Which of the following has the greatest diameter?
    • A. 

      Na

    • B. 

      Na+

    • C. 

        Na-

  • 9. 
      ICl4- has how many total valence electrons?    
    • A. 

      35

    • B. 

      28

    • C. 

      8

    • D. 

      36

    • E. 

      34

  • 10. 
    Which of the following bonds is polar?
    • A. 

      O-S

    • B. 

      F-F

    • C. 

      O-O

    • D. 

      S-S

  • 11. 
    Which of the following is correctly arranged with respect to the size of the atom/ion? (i) S < S1- < S2- (ii) Mg2+ < Na+ < Ne (iii) Ni < Cu+ < Zn2+
    • A. 

      I and iii only

    • B. 

      Ii only

    • C. 

      I and ii only

    • D. 

      I only

    • E. 

      Iii only

  • 12. 
    Which of the following bonds would be longest?
    • A. 

      P-Br

    • B. 

      P-P

    • C. 

      P-I

    • D. 

      P-Cl

    • E. 

      P-F

  • 13. 
    Write a single Lewis structure that obeys the octet rule, and calculate the formal charges on all of the atoms in  PO43-
    • A. 

      P 1+, O 2-

    • B. 

      P 4+, O 2-

    • C. 

      P 2+, O 1-

    • D. 

      P 2+, O 2-

    • E. 

      P 1+, O 1-

  • 14. 
    Using Lewis structures that satisfy the octet rule, determine the number of bonds formed by the central atom in each of the follow: SiO44-, PO43-, SO42-, ClO4-
    • A. 

      2, 3.5, 5, 6.5

    • B. 

      4, 4, 4, 4

    • C. 

      4, 5, 6, 7

    • D. 

      5, 6, 7, 8

    • E. 

      4, 5, 5, 6

  • 15. 
    The energy change that to convert a ground state- atom in the gas phase to a gaseous positive ion:
    • A. 

      Activation energy

    • B. 

      Free energy

    • C. 

      Ionization energy

    • D. 

      Kinetic energy

    • E. 

      Lattice energy

  • 16. 
    Lattice of positive and negative ions held together by electrostatic forces.
    • A. 

      Cesium Chloride

    • B. 

      Gold

    • C. 

      Carbon Dioxide

    • D. 

      Methane

  • 17. 
    Closely packed lattice with delocalized electrons through
    • A. 

      Cesium Chloride

    • B. 

      Gold

    • C. 

      Carbon Dioxide

    • D. 

      Methane

  • 18. 
    Strong single covalent bonds with weak intermolecular forces
    • A. 

      Sodium Chloride

    • B. 

      Gold

    • C. 

      Carbon dioxide

    • D. 

      Methane

  • 19. 
    What mass of Au is produced when 0.0500 mol of Au2S3is reduced completely with excess hydrogen gas.
    • A. 

      9.85 g

    • B. 

      19.7 g

    • C. 

      48.4 g

    • D. 

      34,85 g

  • 20. 
    A hot air balloon rises, which of the following is the best explanation for this action?
    • A. 

      The pressure on the walls of the balloon increases and with increasing temperature

    • B. 

      The difference in temperature between the air inside the outside the balloon produces convection currents

    • C. 

      The cooler air outside the balloon pushes in the walls of the balloon

    • D. 

      The rate of diffusion of cooler air is less than that of warmer air

    • E. 

      The air density inside the balloon is less than that of the surrounding air.

  • 21. 
    ... C10H12O4S(s) + ... O2(g) −−> ... CO2(g) + ... SO2(g) + ... H2O(g) When the equation above is balanced and the all the coefficients are reduced to their lowest whole-number terms, the coefficient for O2 gas is
    • A. 

      6

    • B. 

      7

    • C. 

      12

    • D. 

      14

    • E. 

      28

  • 22. 
    Is a gas in its standard state at 298K
    • A. 

      Lithium

    • B. 

      Nickel

    • C. 

      Bromine

    • D. 

      Uranium

    • E. 

      Fluorine

  • 23. 
    Reacts with water to form a strong base
    • A. 

      Lithium

    • B. 

      Nickle

    • C. 

      Bromine

    • D. 

      Uranium

    • E. 

      Fluorine

  • 24. 
    In the periodic table, as the atomic number increases from 11-17, what happens to the atomic radium?
    • A. 

      It remains constant

    • B. 

      It increases only

    • C. 

      It increases, then decreases

    • D. 

      It decreases only

    • E. 

      It decreases, then increases

  • 25. 
    Which of the following is a correct interpretation of the results of Rutherford"s experiments in which goald atoms are bombarded with alpha particles?
    • A. 

      Atoms have equal numbers of positive and negative charges

    • B. 

      Electrons in atoms are arranged in shells

    • C. 

      Neutrons are at the center of an atom

    • D. 

      Neutrons and protons in atoms have nearly equal mass.

    • E. 

      The positive charge of an atoms is concentrated in a small region

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