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1 Name:. Crrect Questins = Wrng Questins =.. Unattempt Questins = Marks =

2 1. Which metal reacts mst vigrusly with water? (A) Al (B) Ca (C) Fe (D) K 2. Which are strng acids? I. HI II. HNO 3 III. H 2 SO 3 (A) II nly (C) II and III nly (B) I and II nly (D) I, II and III 3. What prducts result when aqueus slutins f CuCl 2 and (NH 4 ) 2 S are mixed? (A) CuS(aq) and NH 4 Cl(s) (C) CuS(aq) and NH 4 Cl(g) (B) CuS(s) and NH 4 Cl(aq) (D) CuS(s) and NH 4 Cl(s) 4. Which element has the highest electrical cnductivity? (A) Ga (B) Ge (C) As (D) Si 5. The mlar mass f a vlatile liquid (bp < 90 C) is t be determined by measuring the density f its vapr in an Erlenmeyer flask capped with Al fil with a pinhle t allw the vapr t escape. A sample f the liquid is added t the pre-weighed flask that is heated in a water bath until the liquid has evaprated, after which the flask is dried and reweighed. Which piece f infrmatin is nt required t determine the mlar mass f the liquid? (A) barmetric pressure (C) temperature f water (B) mass f liquid sample (D) vlume f the flask 6. Which set f reactants prduces a gaseus prduct? I. 6 M HNO 3 (aq) Cu(s) II. 6 M HCl(aq) CaCO 3 (s) (A) I nly (C) Bth I and II (B) II nly (D) Neither I nr II 8. The principal reasn that slid sdium hydrxide is nt used as a primary standard fr acid-base titratins is that it (A) absrbs water frm air. (B) has a lw mlar mass. (C) reacts slwly with many acids. (D) inizes in water. 9. A chlride salt f rhenium cntains 63.6% Re by mass. What is its empirical frmula? (A) ReCl (B) ReCl 2 (C) ReCl 3 (D) ReCl The amunt f chlride in in a water sample is t be determined by adding excess silver nitrate. If Mlar Mass, g ml 1 AgNO AgCl g f silver chlride is precipitated, what mass f chlride in is in the riginal sample? (A) 0.25 g (C) 0.50 g (B) 0.34 g (D) 0.75 g 11. Sn 2 (aq) MnO 4 (aq) H (aq) Sn 4 (aq) Mn 2 (aq) H 2 O(l) When this equatin fr the reactin f Sn 2 (aq) and MnO 4 (aq) is balanced crrectly, what is the rati, Sn 2 / MnO 4? (A) 1/1 (B) 1/2 (C) 2/1 (D) 5/2 12. Hw many millimles f methane, CH 4, are present in 6.4 g f this gas? (A) 0.40 (B) 4.0 (C) 40. (D) Which metal, when expsed t air, frms an xide cating that prtects the metal frm further reactin? (A) Al (B) Cu (C) Fe (D) Zn Page 1

3 13. A 1.50 ml sample f a sulfuric acid slutin frm an autmbile strage battery is titrated with 1.47 M sdium hydrxide slutin t a phenlphthalein endpint, requiring ml. What is the mlarity f the sulfuric acid slutin? 19. Which pints in this phase diagram represent cnditins f temperature and pressure where liquid will be present? b a f d (A) 23.2 M (C) 6.30 M (B) 11.6 M (D) M g c T, C e 14. Accrding t the equatin SnO 2 2H 2 Sn 2H 2 O What vlume f hydrgen, measured at 1 atm and 273 K, is required t react with 2.00 g f SnO 2? (A) L (C) L 15. Which terms are matched crrectly? (A) high vapr pressures (B) high H vap values (C) lw vapr pressure (D) lw biling pints (B) L (D) L high H vap values lw biling pints high biling pints lw vaprizatin rates 16. Three ballns are filled with the same number f atms f He, Ar, and Xe, respectively. Which statement is true under the same cnditins f temperature and pressure? (A) The ballns cntain the same mass f gas. (B) All ballns have the same vlume. (C) The densities f the three gases are the same. (D) The average speed f the different types f atms is the same. 17. A g sample f a gas in a 100-mL flask exerts a pressure f 600 mmhg at 14 C. What is the gas? (A) chlrine (C) kryptn (B) nitrgen (D) xenn 18. Which parameter affects the vapr pressure f a liquid? (A) vlume f the liquid (B) surface area f the liquid (C) vlume f space abve the liquid (D) temperature f the liquid (A) a, b, and g nly (C) a, c, d and f nly (B) a, c, d and g nly (D) c, d, e and g nly 20. Which cmpund is expected t be the mst sluble in water at 25 C? (A) N 2 (g) (C) (C 2 H 5 ) 2 NH(l) (B) O 2 (g) (D) C 2 H 5 OC 2 H 5 (l) 21. A hard, crystalline slid with a high melting pint des nt cnduct electricity in any phase. This slid is mst likely (A) an inic slid. (B) a metallic slid. (C) a mlecular slid. (D) a netwrk cvalent slid. 22. Fr the frmatin f ne mle f each f these gases frm their elements, which reactin is mst endthermic? (A) CO (B) NO 2 (C) O 3 (D) SO 2 = kj ml 1 ) = 33.9 kj ml 1 ) = kj ml 1 ) = kj ml 1 ) 23. The specific heats f several metals are given in the table. If the same number f Jules were applied t the same mass f each metal, which metal 1 Specific Heat, J g 1 C Al Au Cu Hg wuld shw the greatest temperature change? (A) Al (B) Au (C) Cu (D) Hg Page 2

4 24. 4Li(s) O 2 (g) 2Li 2 O(s) At 25 C, H fr this reactin is kiljules per mle f Li 2 O(s) frmed. What mass f Li shuld be reacted with excess O 2 (g) in rder t release 150. kj? (A) g (C) 3.48 g (B) 1.74 g (D) 6.98 g 25. When these substances are arranged in rder f increasing S values at 25 C, what is the crrect rder? (A) Na(s), Cl 2 (g), NaCl(s) (C) Cl 2 (g), NaCl(s), Na(s) (B) NaCl(s), Cl 2 (g), Na(s) (D) Na(s), NaCl(s), Cl 2 (g) 26. The H and S values fr a particular reactin are 60.0 kj and kj K 1 respectively. Under what cnditins is this reactin spntaneus? (A) all cnditins (C) T = 300 K (B) T < 300 K (D) T > 300 K 27. Fr the reactin; 2NO 2 (g) 2NO(g) O 2 (g) at a certain temperature, the initial rate f decmpsitin f NO 2 is ml L 1 s 1. What is the initial rate f frmatin f O 2 (g) in ml L 1 s 1? (A) (B) (C) (D) The reactin A B AB has an enthalpy f reactin f 85.0 kj ml 1. If the activatin enthalpy fr the frward reactin is kj ml 1, what is the activatin energy fr the reverse reactin AB A B? (A) 35.0 kj ml 1 (B) 85.0 kj ml 1 (C) kj ml 1 (D) kj ml Use the experimental data in this table t determine the rate law fr the reactin f hydrgen idide, HI, with ethyl idide, C 2 H 5 I, t frm ethane, C 2 H 6, and idine, I 2. [HI], M [C 2 H 5 I], M [I 2 ] t , ml L 1 s (A) rate = k [HI] (B) rate = k [C 2 H 5 I] (C) rate = k [HI] [C 2 H 5 I] (D) rate = k [HI] 2 [C 2 H 5 I] Which equatin indicates the presence f a catalyst in the reactin? (A) A B D B (C) A A D (B) A B C D (D) A B C 31. The reactin A B C beys the rate law: rate = k[a]. Which graph will prduce a straight line? (A) [A] vs time (C) 1/[A] vs time (B) ln[a] vs time (D) [A] vs 1/time Questins 32 and 33 shuld bth be answered with reference t this system. H 2 (g) I 2 (s) æ 2HI(g) H =51.8 kj 32. Which wuld increase the equilibrium quantity f HI(g)? Assume the system has reached equilibrium with all three cmpnents present. I. increasing pressure II. increasing temperature (A) I nly (C) Bth I and II (B) II nly (D) Neither I nr II 33. What is the equilibrium cnstant expressin fr this system? (A) K = [ HI] 2 [ H 2 ][ I 2 ] (C) K = 2[ HI] [ H 2 ] I 2 [ ][ I 2 ] (B) K = H 2 [ HI] 2 [ ]2 [ ] (D) K = HI [ ] 34. The inizatin f benzic acid is represented by this equatin. H 2 C 6 H 5 COOH(aq) æ H (aq) C 6 H 5 COO (aq) If a M slutin f benzic acid has an [H ] = 1.7 l0 3, what is the K a f benzic acid? (A) 7.7 l0 5 (B) 6.4 l0 5 (C) 3.8 l0 2 (D) 8.4 l C 6 H 5 OH(aq) CN (aq) æ HCN(aq) C 6 H 5 O (aq) The equilibrium cnstant fr this reactin is less than 1. What is the strngest base in this system? (A) C 6 H 5 OH(aq) (C) HCN(aq) (B) CN (aq) (D) C 6 H 5 O (aq) Page 3

5 36. HOCl(aq) æ H (aq) OCl (aq) The inizatin f hypchlrus acid represented abve has K = 3.0 l0 8 at 25 C. What is K fr this reactin? OCl (aq) H 2 O(l) æ HOCl(aq) OH (aq) (A) 3.3 l0 7 (B) 3.0 l0 8 (C) 3.0 l0 6 (D) 3.3 l Lead(II) fluride (PbF 2 ), lead(ii) chlride (PbCl 2 ), lead(ii) brmide (PbBr 2 ), and lead(ii) idide (PbI 2 ) are all slightly sluble in water. Which lead salt will increase in slubility when its saturated slutin is acidified? (A) PbF 2 (B) PbCl 2 (C) PbBr 2 (D) PbI In which prcess des the nitrgen underg xidatin? (A) N 2 2NH 3 (B) N 2 O 4 2NO 2 (C) 2NO 3 N 2 O 5 (D) NO 2 NO Which statement is nt true abut the electrlysis f a 1 M slutin f KI t which phenlphthalein has been added? (A) Ptassium metal is frmed. (B) A yellw clr appears at the ande. (C) A pink clr appears at the cathde. (D) A gas is prduced at the cathde. Questins 40 and 41 shuld be answered with reference t these half-reactins and their standard reductin ptentials. Al 3 (aq) 3e Al(s) E = 1.66 V Mn 2 (aq) 2e Mn(s) E = 1.18 V 40. What prcess ccurs at the ande f a vltaic cell utilizing these tw half-reactins? (A) Al(s) Al 3 (aq) 3e (B) Al 3 (aq) 3e Al(s) (C) Mn(s) Mn 2 (aq) 2e (D) Mn 2 (aq) 2e Mn(s) 41. What is the standard ptential f a vltaic cell prduced by using these tw half-reactins? (A) 0.04 V (C) 2.84 V (B) 0.48 V (D) 6.68 V 42. Ni(s) Cu 2 (aq) Ni 2 (aq) Cu(s) The vltaic cell based n this reactin has a vltage f 0.59 V under standard cnditins. Which f these changes will prduce a higher vltage? I. increasing [Cu 2 ] II. increasing the size f the Ni(s) electrde (A) I nly (C) Bth I and II (B) II nly (D) Neither I nr II 43. When a phsphrus atm is cnverted t a phsphide in, what happens t the number f unpaired electrns and the ttal number f electrns arund the phsphrus? unpaired electrns ttal electrns (A) increases increases (B) decreases increases (C) increases remains the same (D) decreases remains the same 44. Which list includes species with the same number f electrns? (A) Mg, Ca, Sr (B) Li, Na, K (C) K, Cl, S 2 (D) Fe 2, C 2, Ni Which pair f symbls represents nuclei with the same number f neutrns? (A) 56 C and 58 C (C) 57 Fe and 58 Ni (B) 57 Mn and 57 Fe (D) 57 C and 58 Ni 46. Which list includes elements in rder f increasing metallic character? (A) Si, P, S (C) Al, Ge, Sb (B) As, P, N (D) Br, Se, As 47. Hw many unpaired electrns are in an irn atm in its grund state? (A) 6 (B) 4 (C) 2 (D) Hw d the energy gaps between successive electrn energy levels in an atm vary frm lw t high n values? (A) All energy gaps are the same. (B) The energy gap decreases as n increases. (C) The energy gap increases as n increases. (D) The energy gap changes unpredictably as n increases. Page 4

6 49. Which bnd is expected t be the least plar? (A) OF (B) PF (C) SiN (D) BCl 55. Which f these cmpunds cntains a carbxyl grup? (A) prpanl (B) prpanal (C) prpanne (D) prpanic acid 50. Fr which element wuld XH 3 be a stable species? (A) C (B) Cl (C) P (D) S 51. Which species has a Lewis diagram and structure mst like that f the carbnate in, CO 3 2? (A) NO 3 (B) CH 3 (C) SO 3 2 (D) PO Which cmpunds cntain bth inic and cvalent bnds? I. BaSO 4 II. Ca(NO 3 ) 2 III. NH 4 Cl (A) I nly (C) II and III nly (B) I and III nly (D) I, II and III 56. Which class f cmpunds cnsists exclusively f saturated hydrcarbns? (A) alkanes (C) alkynes (B) alkenes (D) armatics 57. Hw many different alchls (nt including ptical ismers) have the mlecular frmula C 4 H 10 O? (A) 2 (B) 3 (C) 4 (D) What is the psitin f the brmine atm relative t the methyl grup in 3-brmtluene? (A) meta (C) para (B) rth (D) trans 53. When the species NH 4, H 3 O, and H 2 F are arranged in rder f increasing HXH bnd angles, what is the crrect rder? (A) H 3 O < NH 4 < H 2 F (B) H 2 F < H 3 O < NH 4 (C) NH 4 < H 2 F < H 3 O (D) NH 4 < H 3 O < H 2 F 54. The nitrite in, NO 2, may be represented by tw majr resnance frms. The lengths f the nitrgen-t-xygen bnds in this in are expected t be (A) the same as the length f nitrgen-t-xygen duble bnds. (B) the same as the length f nitrgen-t-xygen triple bnds. (C) between the lengths f a nitrgen-t-xygen single bnd and a nitrgen-t-xygen duble bnd. (D) between the lengths f a nitrgen-t-xygen duble bnd and a nitrgen-t-xygen triple bnd. 59. Which f these cmpunds have cis- and trans- ismers? (A) dichlrbenzene (C) 1,2-dichlrprpane (B) 1-chlrprpene (D) dichlrethyne 60. If a certain plymer has the frmula (CH 2 CCl 2 CH 2 CCl 2 ) n, frm which mnmer is it made? (A) HC CCl (B) ClHC=CClH (C) Cl 2 C=CH 2 (D) H 2 C=CClH Page 5

7 ANSWER KEY Number Answer 1. D 2. B 3. B 4. A 5. B 6. C 7. A 8. A 9. C 10. A 11. D 12. D 13. B 14. D 15. C 16. B 17. A 18. D 19. C 20. C Number Answer 21. D 22. C 23. B 24. C 25. D 26. B 27. A 28. D 29. C 30. A 31. B 32. B 33. D 34. B 35. D 36. A 37. A 38. D 39. A 40. A Number Answer 41. B 42. A 43. B 44. C 45. D 46. D 47. B 48. B 49. A 50. C 51. A 52. D 53. B 54. C 55. D 56. A 57. C 58. A 59. B 60. C

CHM 152 Practice Final

CHM 152 Practice Final CM 152 Practice Final 1. Of the fllwing, the ne that wuld have the greatest entrpy (if cmpared at the same temperature) is, [a] 2 O (s) [b] 2 O (l) [c] 2 O (g) [d] All wuld have the same entrpy at the