MT 2010 ANS - Page 1 of 8 ANSWER KEY Part 1 Multiple Choice(14 marks total For each numbered statement below circle the letter that corresponds to

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Page 1 of 8 ANSWER KEY Part 1. Multiple Choice (14 marks total) For each numbered statement below, circle the letter that corresponds to the best answer. There is only one correct answer per question. Each question answered correctly is worth 2 marks. 1. Which of the following compounds has a non-hydrogen atom that does not obey the octet rule? (a) arsenic trichloride (b) carbon dioxide (c) sulfur hexafluoride (d) ammonia (e) hydrazine (N 2 H 4 ) 2. Arrange the following species in order of increasing size: K, As 3+ , Ge + , Ga + (a) As 3+ < Ga + < Ge + < K (b) Ga + < As 3+ < Ge + < K (c) Ge + < K < Ga + < As 3+ (d) As 3+ < Ge + < Ga + < K (e) As 3+ < Ge + < K < Ga + 3. Which one of the following statements is true? (a) Lithium does not react with water. (b) Sodium metal is mined in Northern Canada. (c) The electron affinity of rubidium is smaller in magnitude than that of sodium. (d) The chemical bonds between rubidium atoms in rubidium metal are ionic. (e) The reaction of cesium with water releases oxygen gas. 4. What is the oxidation state of Cr in (NH 4 ) 2 Mg(CrO 4 ) 2 ·6H 2 O? (a) +2 (b) +3 (c) +4 (d) +5 (e) +6
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Page 2 of 8 5. Which of the following elements has 4 neutrons in the nucleus of its most abundant isotope? (a) He (b) Li (c) Be (d) B (e) C 6. Molecules that have this shape are always polar. (a) see-saw (b) trigonal planar (c) octahedral (d) linear (e) tetrahedral 7. Which of the following is expected to exist as an isolable molecule? (a) C 4 H 2 (b) H 3 O (c) N 2 H 6 (d) F 4 (e) PH 6
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Page 3 of 8 Part 2. Short Answer Questions 1. For this question, consider only the following elements as possible answers: Li, Na, K, Rb, Cs Be, Mg, Ca, Sr, Ba For each part, give the symbol from the above list that makes the statement correct. (a)
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This note was uploaded on 01/15/2012 for the course CHEM 121 taught by Professor Donnecke during the Winter '07 term at The University of British Columbia.

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MT 2010 ANS - Page 1 of 8 ANSWER KEY Part 1 Multiple Choice(14 marks total For each numbered statement below circle the letter that corresponds to

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