Exam: Ch 6 – 9 & 25Name:

AP Chem (75 pts)I have not given, received, nor will give any aid on this exam.

Version JPeriod: 5 67November 18, 2004

SECTION I: Multiple Choice (3 pts each): Choose the option that is the best answer or completes each question or statement. Write your answers in the blanks provided and erase mistakes completely. In this section, as a correction for haphazard guessing, one-fourth of the number of questions you answer incorrectly will be subtracted from the number of questions you answer correctly.

  1. Two samples with the same emission spectra:
  2. Are emitting visible light
  3. Are made up of identical elements.
  4. Have the same chemical formula.
  5. Have been heated to excite the electrons.
  6. Not enough information given or none of the aboveAns: ____
  1. Which of the following atoms has electrons in an excited state?
  2. 1s2 2s2 2p2
  3. 1s2 2s2 2p6 3s1
  4. 1s2 2s2 2p6 3s2 3p5
  5. 1s2 2s2 2p6 3s2 3p6 3d1
  6. Not enough information given or none of the aboveAns: ____
  1. All of the electrons in a given orbital have the same value of the:
  2. Angular quantum number (l)
  3. Magnetic quantum number (ml)
  4. Principal quantum number
  5. Spin quantum number
  1. I only
  2. II only
  3. I, II, and IV only
  4. I, II, III, and IV
  5. Not enough information given or none of the aboveAns: ____
  1. Which of the following has the largest radius?
  2. S1-
  3. S
  4. S1+
  5. Cl
  6. Not enough information given or none of the aboveAns: ____

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  1. Which series is ranked in order from largest to smallest electron affinity (becoming less negative)?
  2. Cl, S, P
  3. S, Cl, Ar
  4. Se, S, O
  5. F, Cl, Br
  6. Not enough information given or none of the aboveAns: ____

  1. Which of the following should require the smallest energy?
  2. 1st ionization energy of Mg
  3. 2nd ionization energy of Mg
  4. 1st ionization energy of Al
  5. 2nd ionization energy of Al
  6. Not enough information given or none of the aboveAns: ____
  1. When compared with CaS, the compound CaO:
  2. Has a lower lattice energy
  3. Has a greater formula weight
  4. Has a greater difference of electronegativity
  5. Has a smaller difference of metallic character
  6. Not enough information given or none of the aboveAns: ____
  1. Which of the following should display the lowest level of paramagnetism?
  2. Ca
  3. V3+
  4. Ni2+
  5. Cu
  6. Not enough information given or none of the aboveAns: ____
  1. The number of delocalized electrons in PS21- is:
  2. 0
  3. 1
  4. 2
  5. 3
  6. Not enough information given or none of the aboveAns: ____
  1. The hybridization present in the IF21-compound is:
  2. sp3
  3. sp3d
  4. sp3d2
  5. sp2d2
  6. Not enough information given or none of the aboveAns: ____
  1. In P2H2, there are __ sigma bonds and __ pi bonds.
  2. 3 sigma and 1 pi.
  3. 3 sigma and 2 pi.
  4. 4 sigma and 0 pi.
  5. 2 sigma and 2 pi.
  6. Not enough information given or none of the aboveAns: ____
  1. Which series lists the compounds in order of increasing bond order?
  2. N2, O2, F2
  3. F2, O2, N2
  4. O22-, O22+, O2
  5. Br2, Cl2, F2
  6. Not enough information given or none of the aboveAns: ____

13.The octet rule is not violated by the central atom in:

  1. XeF4
  2. SF4
  3. KrF2
  4. PF3
  5. Not enough information given or none of the aboveAns: ____
  1. In the process of hybrid orbital formation, the purpose of promoting one or more electrons is to:
  2. Make sure that all electrons have the same spin prior to hybridization
  3. Make sure that all electrons in atomic orbitals are unpaired prior to hybridization
  4. Increase the potential number of molecular orbitals
  5. Increase the number of unpaired electrons
  6. Not enough information given or none of the aboveAns: ____
  1. Which of the following compounds does not contain a C—O (single) bond?
  2. Alcohol
  3. Ester
  4. Ether
  5. Ketone
  6. Not enough information given or none of the aboveAns: ____

SECTION II: Free Response

  1. (22 pts) Consider 1,2-dichloropropane.
  2. (6 pts) Draw the Lewis structure for this compound and label the hybridization of each carbon.
  1. (10 pts) Although there is only one compound that is named 1,2-dichloropropane, there are two compounds that can be named 1,2-dichloropropene. Explain. Be sure to draw Lewis structures, name the two 1,2-dichloropropene compounds, and label the hybridization of each carbon.
  1. (6 pts) Estimate the Cl-C-C bond angles in:1,2-dichloropropane: _____

1,2-dichloropropene: _____

1,3-dichloropropyne: _____

  1. (8 pts) Using the following information:O2 (g) → 2 O (g)H = 495 kJ/mol
  1. Determine what is the maximum wavelength of light necessary to decompose oxygen gas to atomic oxygen.
  1. In what band (“section”) of the electromagnetic spectrum can this radiation be found? (Sorry, no guessing without justification.)

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