Questions - Avon Chemistry

QUIZ # 2 – AP Chemistry 3Need to score a minimum of 12 points out of the 20 questions. Not answering the question will not countagainst you, but it cannot count for you!You have 24 minutes. GO !!!Questions 1 – 4, The set of lettered choices below is a list of elements. Select the one lettered choice thatbest fits each statement. A choice may be used once, more than once, or not at all.(A) CO 2(B) BF 3(C) NH 3(D) N 2(E) CCl 41. This molecule contains double-bonds and linear geometry2. This molecule has triangular planar geometry3. is soluble in water4. This molecule is a weak base5. Which of the following is/are true regarding Ca and Mg?I. Ca has two valence electrons in its outer shell.II. The valence electrons of Ca in a principal energy level n = 4.III. Ca and Mg both are diamagnetic either neutral or when an ion.(A) I only (B) II only (C) I and II only (D) I and III only (E) I, II, and III6. At standard temperature and pressure (STP), what is the maximum number of liters that oxygen gasthat can react with hydrogen gas to form 16.0 liters of water?(A) 4.00 L (B) 8.00 L (C) 12.0 L (D) 16.0 L (E) 22.4 L7. Which of the following is NOT true regarding the following atoms?(A) Cl -1 and Ar are isoelectronic.(B) Cs is likely to exist in ionic compounds as Cs +2 .(C) O is likely to exist in ionic compounds as O -2 .(D) He and Ne are unlikely to participate in covalent bonding with other atoms.(E) I -1 and Br -1 are stable ions in solution.8. Which of the following regarding ionization energy is TRUE?(A) The second ionization energy of Mg should be smaller than the first.(B) The first ionization energy of Cs is higher than that of Na.(C) The atom with the highest first ionization energy is H.(D) The noble gases as a group have the highest ionization energies.(E) The atom with the lowest ionization energy is He.

9. An atom has the following ionization energies (IE).IE 1 = 589.8 kj / moleIE 2 = 1145.4 kj / moleIE 3 = 5912.3 kj / moleIE 4 = 7355.7 kj / moleThese values most likely correspond to which of the following:(A) Ca (B) Li (C) I (D) Si (E) Al10. Which of the following statements is/are true:I. Fe is expected to be paramagneticII. Zn is expected to be diamagneticIII. Zn +2 , which has a ground-state electron configuration of [Ar]4s 0 3d 10 , would be expected to beparamagnetic.(A) I only (B) II only (C) I and II only (D) I and III only (E) I, II, and III11. Which of following concerning PCl 5 and PCl 3 is/are true?I. PCl 3 has a net dipole moment, whereas PCl 5 does not.II. The geometry of PCl 3 is trigonal planar.III. Both PCl 3 and PCl 5 use higher energy d orbitals for bonding(A) I only (B) II and III only (C) I and III only (D) I and II only (E) I, II, and III12. Which of the following oxygen containing compounds is most ionic?(A) SiO 2 (B) CaO (C) Al 2 O 3 (D) NO 2 (E) Cl 2 O13. The carbon atoms of acetic acid, CH 3 COOH, (also pictured below) exhibit what type(s) ofhybridization?I. spII. sp 2III. sp 3(A) III only(B) I only(C) I and II only(D) II and III only(E) I, II, and III14. Which set of quantum numbers is impossible?(A) 5 4 3 ½(B) 3 0 -2 ½(C) 5 4 -3 -½(D) 3 1 0 ½(E) 4 3 1 -½

15. Balance the half-reaction for an acidic solution using the smallest possible whole-numbercoefficients and entering the proper number of electrons where needed.BrO 3 -1 → Br 2(A) there should be 10 electrons on the left side(B) there should be 8 electrons on the right side(C) there should be 7 electrons on the left side(D) there should be 8 electrons on the left side(E) there should be 12 electrons on the right side16. An aqueous KNO 3 solution is cooled from 75 0 C to 15 0 C. Which statement from the following istrue?(A) The molarity of the solution does not change.(B) The molality of the solution decreases.(C) The density of the solution does not change.(D) The molality of the solution does not change.(E) The mole fraction of the solute increases.17. 2 H 2 + O 2 → 2 H 2 OFrom the table, determine the enthalpychange for the formation of water.(A) 0 kJ(B) 485 kJ(C) 464 kJ(D) -464 kJ(E) -485 kJBond Average Bond Energy (kJ / mol)H - H 436O = O 499H - O 46418. Nitrogen forms a number of oxides. Which of the following oxides is 64% nitrogen?(A) N 2 O 5 (B) N 2 O 4 (C) N 2 O 3 (D) N 2 O 2 (E) N 2 O19. All the following may serve as reducing agents, EXCEPT:(A) Mg (B) Na +1 (C) Br -1 (D) O -2 (E) Pb +220. Which reaction(s) would occur at the cathode?(A) Ba +2 (aq) + 2 e -1 → Ba (s)(B) 2 F -1 (aq) → F 2 (g) + 2 e -1(C) Cu +1 (aq) → Cu +2 (aq) + e -1(D) Both B and C(E) None of the above