Quiz 6 - General Chemistry 120 November 14, 2007 Quiz GB...

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Unformatted text preview: General Chemistry 120 November 14, 2007 Quiz GB Name I. Multiple Choice Choose the most nearlv correct answer. (80 pts. — 4 each) Use the Periodic Table, T able. Consider the partial Periodic Table reproduced below. Ge Se Sn Te 6 / 1) Refer to Table. Which element has the largest atomic radius? A) Ge B) Se C) Sn D) Te B lfiefer to Table. Which element has the greatest ionization energy? A) Go B) Se C) Sn D) Te B '3) Refer to Table. Which has the greatest non-metallic character? A) Ge B) Se C) Sn D) To C A) fiefer to Table. Which has the least non-metallic character? A) Ge B) Se C) Sn D) Te D/Sf Which of the following is the correct Lewis symbol for N? A) C) E) N N .N 6) Which of the following is the correct Lewis symbol for Br’ ? A) B) C) D) E} : Ir» :Br: :Br: {7 ) Potassium metal and chlorine react vigorously to form potassium chloride. Which statement is correct? A) K atoms lose an electron and become Ar atoms. B) Cl atoms gain an electron and become Ar atoms. C) K atoms gain an electron and attain the same electron configuration as an Ar atom. D) Cl atoms gain an electron and attain the same electron configuration as a Ar atom, E) The K and C] atoms change into diffean more stable atoms. D) D/8)A compound is found to form between P and C]. What is the most likely formula for this compound? A) PC] B) PlCl C) P2C13 D) PC13 E) P3Cl A/ 9) What is the correct formula for the product of the reaction of strontium metal and nitrogen? A) SEN; B) SrN C) 5er D) SrgNa E) SrN3 l D; 10) Which of the following would have the largest (most negative) lattice energy? Hint: Look at ionic radii. A LiF/ /B)' NaCl KC)“KBr D) KF /E) RbI BI 11) How many covalent bonds docs oxygen tend to form? A) 1 B) 2 C) 3 D) 4 E) 5 E- Which of the following orders of clcctronegativity is incorrect? A)I<C1<F B)Se<S<O C)Si<N<O D)Si<P<N E)N<P<S l B 3) When H; and Br; react to form hydrogen bromide, which statement is NOT correct? 1e two hydrogen bromide molecules are in a lower energy state than are one hydrogen molecule and one bromine molecule. B) The hydrogen and bromine atoms share a pair of electrons to form a covalent bond. C) The bond results from the reaction of an H’ ion and a B" ion. D) Two H—Br bonds are stronger than one H‘H bond and one Br-Br bond. E) All of the above are correct. , C—C C—Cl C—F CHI D / ' ' - - - A B c D 14) Which order 15 correct for increasmg polarity (least polar first)? A)A<D<C<B B)D<C<B<A C)C<B<A<D D)A<D<B<C E)A<B<C<D C/I‘S) Which combination of atoms would be most liker to produce a covalent bond? A) K, 0 B) Cu, Se C) B, F D) Fe, 5 E) A1, C1 A {16) Which is the best Lewis structure for C002? (Formal charges are not shown.) A) B) C) ' D) E) :0: 30: :0: :0: u .. n. i n u I u u I H .00 _o.—oo—.. - :Cl—C—Cl: :Cl—C—Cl: :Clwc—Ch :cl—c2c1; .Cl C 0 Cl. 6 4 17) According to the Lewis theory, the total number of lone pairs in an NBr; molecule is 0 B) l. C) 3. D) 9. E) 10. f“ ) Which one of the following species does not obey the octet rule? [-14 B) NH; C) BF; D) H20 E) CO: i E 19) Predict which of the following bonds would be the shortest. A) C—Cl B) C—C C) C=C D) CEC E) Cl—Cl Moms of which of the following elements readily form triple bonds? A) B B) N C) Ar D) S E) Cl 11. Write the Lewis structure of 5042'. (10 pts.) . _. ~13 .‘LAS‘J‘iG/[zag 3—5r—‘c; :23:qu l ' - ’ J A. f C.) :’ O ; III. Math-Based Problem. Estimate the AH”, in kJ. for the following reaction from the bond energies given. (10 pts.) H: (a) + Br: (5, —+ 2 RBI (8) Bond energy (kJ/mol): H—H, 436-, HaBr, 364; Br—Br, 193. 4’) I _ (t i)— , 13‘" _r v ‘ :1! h ‘ tr“ // , e M /'""Ul ...
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This test prep was uploaded on 04/22/2008 for the course CHEM 120 taught by Professor Nyssen during the Fall '07 term at University of Tennessee.

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Quiz 6 - General Chemistry 120 November 14, 2007 Quiz GB...

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