Secound_exam - King Faisal University Department of Chemistry Chem 140 Second midterm Exam Name*Answer all questions S No Good luck Part I(40 pts 4

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King Faisal University Department of Chemistry Chem 140 – Second midterm Exam Name: S. No.: **Answer all questions Good luck _____________________________________________________________________ Part I: (40 pts, 4 each) Multiple choice questions: 1. Which of the following molecules has two lone pairs of electrons around the central atom: a) SI 5 b) BrF 3 c) PF 5 d) PF 6 e) SF 4 3. How many electrons in an atom can have n = 5, l = 3? A. 6 B. 10 C. 2 D. 14 E. None of the above 2. Which of the following has the shortest Carbon Oxygen bond length? (in each species, carbon is the central atom): A. CO B. CO 2 C. CO 3 2 D. HCO 2 E. H 2 CO 4. Electronegativity increases along the periodic table A. from bottom to top and from right to left B. from bottom to top and from left to right B. from top to bottom and from right to left D. from top to bottom and from left to right. E. cannot be predicted
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2 5. What is the hybridization of the central atom in NO 3 - ion. A. sp B. sp 2 C. sp 3 D. sp 3 d E. sp 2 d 2 6. The approximate angle(s) expected for the molecular geometry of PCl 3 ? A. 180°
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This note was uploaded on 01/08/2011 for the course CHEM 140 taught by Professor Basimali during the Spring '10 term at King Fahd University of Petroleum & Minerals.

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Secound_exam - King Faisal University Department of Chemistry Chem 140 Second midterm Exam Name*Answer all questions S No Good luck Part I(40 pts 4

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