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Exam 2 - Fall 2011 - Chem1215 — Fall 2011 ma L air"...

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Unformatted text preview: Chem1215 — Fall 2011 ma L air" 3“ Exam #2 October 13, 2011 Name A v' Section 53% Total of 34 questions — q #1 through #33 are multiple choice questions. All the questions are worth 3 points each. Darken the appropriate circle in the separate ‘SCANTRON”. There is only one answer for each question. 1. Covalent bonds are formed between a) transition metals @nonmetals 0) metal and nonmetal d) metalloids e) alkali metals 2. The element among the following that does not belong to either the halogen or noble gas group among the following is a) Xe b) F 0) Cl e) Kr 3. Which of the following is the correct formula fgfiobalt (ll) chloride? a) (20131 b) C966 0) Co’Cl; @CoClz e) C0395” 4. Which one of the following elements belong to the ”inner transition” category? a) Pb b) Zr c) Ba d) Y 5. After balancing the equation shown below, the coefficient for CO; is :2'» F6203 + to ——> 3 co,2 + xi Fe a) 1 b) 2 Q 3 d) 4 e) 5 6. The compound with the wrong formula among the following is H2NO3 Be(NOz)2 C) (38504 e) Mg3N2 7. In a neutralization type of reaction, one of the reactants is always: a) ammonia b) a salt @an acid d) a gas e) a solid precipitate 8. Which of the following elements exists as a gas at room temperature? ’ @fluorine b) meyéry c) boron d) iodine e) bromine 9. A solid forms when K2C03 and CoClz solutions are mixed. The likely formula of the solid is a) C03(CO3)2 b) K2CO @CoCog a) C0(CO3)2 e) K2Clz 10. The correct formula of the compound formed when Cr2+ and sulfate ions combine is (a)? CrSO4 b) Cr2(SO4)3 c) CrzS d) Cr(SO4)3 e) Cr3804 11. Which of the following is an indication of a chemical reaction ’ a) melting b) phase change color change d) using a liquid reactant e) yielding small quantity of product 12. The isotopic symbol for a neutral atom with 33 neutrons and a mass number of 59 is a) :3 Fe 16;} :2 Fe c) S: Pr d) :2 Pr _ e) :2 Cu 13. Which of the following is not a binary compound? a) LigS @ Na2804 c) N205 d) K3N e) H20 14. The compound that may be classified as type 11 among the following is a) CaClz b) leCO3 c) C8(C102)2 d) HN03 MnS 15. An element's most stable ion forms an ionic compound with calcium having the formula Cang. If the ion of the element X has a mass number of 31 and 18 electrons, what is the identity of the element, and how many neutrons (n) does it have? a)Ar,l8n b)Ca,11n c)P,18n @9an e) N,3ln 16. The charge of the cation in M112(C03)3 is , a) +1 @H 0) +2 d) ~2 c) —1 1,5} 2. i" Wilt) ‘57 17. An aqueous solution of copper (ll) nitrate is allowed to react with an aqueous solution of sodium carbonate. The identit of the solid precipitate, if at all, is a) Cu(N03)2 @uC03 c) NazCO3 d) NaN03 e) no precipitate 18. An ionic compound is composed of three calcium ion and two anions. Which of the following could be the anion? a) s2' b) A13+ c) Ba2+ @P3' e) Cl' 19. The compound that is expected to be ionic among the following is a) X603 @Nng c) BF3 d) 1205 e) CCl4 4, K3 {my} Ms? ‘1)” “a; + KCJ {my} 20. Chlorine gas reacts with aqueous potassium iodide to form solid iodine and aqueous potassium chloride. According to this equation, one of the products is @212 b) Cl 0) K1 d) (:12 e) 1 21. Predict which of the following metals reacts with aqueous nickel (II) nitrate a) Sn b) Cu 0) Pb d)‘ Ag Fe 22. The formula of the ions present in an aqueous solution of K3PO4 are a) K3+ (aq) and P043" (aq) b) 3 K+ (aq) and P04" (aq) G1) 3 K+ (aq) and PO43' (aq) d) 3 TC (3) and 1308' (s) e) K; (aq) and PO42' (aq) 23. The reaction: H2504 (aq) + CsOH (aq) ——> H20 (1) + C52804 (aq) can best be described as a) combustion b) decomposition @acid—base d) single displacement e) synthesis 24. Ionic compounds possess which one of the following structures? a) molecular b) covalent © lattice d) lateral e) none of the above 25. Which one of the following classes of ions form predominantly soluble compounds? a) hydroxides b) phosphates c) sulfides d) carbonates @sulfates 26. The correct systematic name of Hg(Br03)2 is a mercury bromide b) mercury bromate c) mercury (11) bromite mercury (II) bromate e) mercury dibromide 27. The number of electrons present in Mn3+ are a) 25 (£9 22 c) 28 d) 20 e)36 28. The element that is considered to be a metalloid among the following is e b) 2% 0) Al d) e) Ga 29. The correct formula of chlorous acid is a) HClO3 H2C104 C) H2ClO3 H2ClO3 @ HClOz 30. For the reaction shown, the spectator ions are Cu(N03)2 (aq) + NazCO3 (aq) -——> CuC03 (s) + 2NaN03 (aq) @Nafi (aq) and 2N03'(aq) b) Cu2+(aq)and2N03' (aq) c)2Na+(s) andZNOg' (aq) a) Cu3+ (s) and 0032' (s) e) 3Na+ (aq) and CO32'(aq) 31. Determine the compound among the following that is insoluble in water. a) K2CO3 b) MgSO4 C) NlBl‘z Cl) HgClz BaC03 32. The coefficients required in order to balance the equation, CaCz + ZHZO "—’ Ca(OH)2 + CZHZ are (from left to right) a)1,1,2,2 b)2,2,2,1 c)1,2,1,2 @1,2,1,1 e)1,2,2,1 33. The one that results in a reaction when the following substances combine is a) NazSO4 (aq) + HCl (aq) b) Fe (5) + AlCl3 (aq) @HCl (aq) + Na2$O4 (aq) d) AgN03 (aq) + KOH (aq) e) HCl (aq) + NagPO4 (aq) 34. ( worth 3 points — Write the answer to this question in the space provided) Write the products of the double displacement reaction of aqueous solutions of ammonium carbonate and aluminum nitrate then balance the equation and finally write the total and net ionic equations for the reaction: a . ‘5 (Walzmfifa’fi Z'Atllwziz Ctr?” thgwalaat ’“ziwélai’fi *‘ 5 m (91%;; at; t W? J- ° W? r we "'r A” I’; ~ - "5‘ 1%; If“ f» “r; ‘ a. *1 fl 2 2 K A \’> u?» 7) (1:93 {32? “MW, r“ A” 3;; ...
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Exam 2 - Fall 2011 - Chem1215 — Fall 2011 ma L air"...

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