) ) i 50 E f!!. 25. cl:. 100 ":; 75 CANNOT BE USED IN THIS SECTION. 5. Which of the following best describes the process of writing on paper with a

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Abner Holmes
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1 ) ) ) Intermolecular Forces Multiple Choice I CALCULATORS Name: CANNOT BE USED IN THIS SECTION 1. Which statement best describes why vegetable oil exists as a liquid at room temperature? (A) The molecules have weak dipole-dipole forces due to the small electronegativity different between neighboring carbon atoms. (B) The molecules have weak London dispersion forced due to their relatively small size. he molecules are saturated.. he double bond between carbon atoms gives the structure a bent shape that reduces London dispersion forces. (E) The average kinetic energy of vegetable oil is greater than that of margarine ats"c.. Which of the following processes can be classified as a physical change and a chemical change? (A) COors) COo(g) (B) COo(g) C(s) + Oo(g) H4(g)+ Oo(g) C0(g) + H0(1) anoj(; Na+(aq) + N03'(aq) o(g) OO(llq) c! 3. Which of the oxides listed below exists as a gas at 98 K and 1.0 atm? (A)CaO (B) MgO (C) KoO,i0o Oo 4. Which of the following processes would produce the highest vapor pressure at S"C and 1 atm? (A) NaCI(s) NaCI(g) (8) Fe(;) Fe(g) (C) NH3(/) NH)(g) ho(/) HoO(g) csrh)(i) PH3(g) _ 5. Which of the following best describes the process of writing on paper with a eets of carbon atoms that are bonded together in a trigonal planar geometry, producing a covalent network solid, slide overtop of One another as pi-bonds are broken. (8) The weak intermolecular forces between lead atoms in the metallic solid sever, allowing the atoms to be deposited on the paper. (C) Weak London dispersion forces between individual carbon atoms are broken, allowing them to be deposited on the paper. (D) The carbon containing polar compounds in the pencil form H-bonds with the cellulose fibers on the paper. (E) The carbon containing non-polar compounds in the pencil bond to the nonpolar sections of the cellulose fibers on the paper with dispersion forces. Questions 6-7 refer to the graph below that depicts the temperature changes that occur as a certain pure substance is heated at a constant rate in an open container at 1 atm. cl:. 100 ":; 75 ;; i 50 E f!!. 5 t-1 1' '-4 1'-5 1'-6 Time 6. What is the normal boiling temperature for this substance? (A)50"C (B) 7S"C "C "c O"C 7. Which of the following statements provides the best indication of what is occurring from t = 3 to t = 4? (A) Gaseous particles arc move further away from one another. (8) The solid and liquid phases are in equilibrium with aile another. he liquid and gas phases arc in equilibrium with one another. he vapor pressure of the liquid is increasing. he average kinetic energy of the particles within the solid is increasing.

2 G 100 s, ":; 80 ' 60., "'" 5 40., I- 0 o o Time (min) 8. The cooling curve for a pure substance is plotted above. At which point on the above curve is the substance supercooling? (A)A ) D (E) E ( ( ( / I" I

3 ( c ( <, Chemical Bonding Multiple Choice I Name: CALCULATORS CANNOT BE USED IN THIS SECTION 1. Which of the following statements pertaining to the ionic solids represented below are true? (ilm- + - (iil of ,, _ Questions 4-6 refer to the following choices. (A) Bonds result from electrostatic forces of attraction between cations and anions. (B) The entire structure is held together with sigma bonds. (C) The structure is held together with sigma bonds and a abond. (D) The structure contains two double bonds. (E) The structure contains a triple bond I. Both structures are ductile. II. Structure (i) has a higher melting point than structure (ii), III. Both structures conduct electricity when in the solid state. IV. Both structures conduct electricity when in the liquid state. (A) lonly (B) I and II only (C) I and IV only II and 1Il only II and IV only -'6. What is the formal charge on the xenon atom in the following structure? :i=: :F-XI\-F:.. I'.. If.: (A)- (B) What type of hybridization exists around the three carbon atoms in H,C, C" CH?,, <I,sp", and sp ',sp, and sp J, Sp, and sp (D) sp', sp', and Sp3 _<!Sp, sp', and Sp 5. AJ 6.. :t; 7. The melting point of FeO is lower than the melting point of Fe0,. Which of the statements below provide reasons for this occurrence? I. Fe is larger than Fe' II. Fe' has a greater overall positive charge than Fe ". Ill. Fe0, contains five ions, whereas FeO only contains two ions. (A) I only }and II only (1:)11 and 1Il only (D) I and III only ' II, and III 8. Which of the following is a non-metal? (A)Ge (B) Po a At Bi 9. h of the following is an ionic compound? ach (B)N0 (C)OF (D)SCI (E) cot k

4 Chemical Bonding MUltiple Choice II Name:. CALCULATORS CANNOT BE USED IN THIS SECTION 1. Which of the following structures have a linear geometry? I. XeF. II. IF', Ill. CO (A) I only (B) II only (C) III only (D) I and III only.il.andlll. Which structure contains one double bond? (A)H10 t(9) 03 )C0 (0) CH (E) NF, 3. The central atom in a molecule displays sp' hybridization. What shape do the charge clouds make? (A) Linear TrigOnal Planar Tetrahedral Trigonal bipyramidal c_ (E) Square pyramidal 4. Which of the following structures has one lone pair of electrons around the central atom? (A) H0 C0 PH, CH. (E) BF, 5. Which of the following molecules in polar. (A)CH. (B) CO (C) BF, CH3F te) CS.P Questions 6-8 refer to the following structure. [:-S=N:)- 6. What is the formal charge on the sulfur atom? (A) - (B) -1 (C) 0 (D) What it the formal charge on the nitrogen atom? (A) -3 - (0) +1 C(E) What is the formal charge on the carbon atom? (A) -4-3 (C) 0 (0)+3 (E) Which of the following bonds has the longest bond length? (A) N-O (B) N- F (C) N - Br (0) O-CI e:(e) P-Br 10. Which of the following bonds is most covalent in character? (A) Ca - F (B) S-F (C) P - F (0),0-0 bai-o ) )

5 ( ( ( Chemical Bonding: Free Response I (b) The melting temperature for KBr(s) is different from that-of KCI(s). Question Name: _ (a) The following questions pertain to sulfur dichloride, SCI I. Draw a complete Lewis structure of sulfur dichloride, SCI a: II. Identify the type of hybrid orbitals that surround the central atom. \' III. Identify the geometric shape of this structure. IV. Is the bond angle in this structure greater than, equal to, or less than 109.S o? Justify your answer. lot1 )\) <;\+ fcuc-\ cb> () """'-ti\ MFfS "'b -\\Aeu.<. taj\-\t,. frc..t - 's \W-S CQ. o: \A.tS cl0 r:. I. What types of bonds exist in these two structures? Explain., Vli\eW + lo'" c. \..\o II\. "" II. Draw representations of both solids that show the relative differences in the sizes of the four particles and the ratio of one particle to another in each solid. CQ_ III. Which compound has the highest melting temperature? Justify your answer. W- Uut(b) -rorcu U-k- l' 06 ct\\a..(.( idwet \ t Ql"\...-Er s Jt os ck(as \S. Ci" E!r tacuus g( c) If you were to design an experiment to identify an unknown compound, would you choose to use an infrared spectrometer or an ultraviolet/visual spectrometer? Justify your answer. WWcM. ll a; E"H«_. \ttt-queuc;rs O.\--

6 Chemical Bonding: Free Response II Question Name: _ (a) The following questions pertain to the SiCI. compound: - I. Draw the Lewis structure for.sci.. All valence electrons must be included the drawing. '...':Jl!" \... o._--q!, '"..Cl! II. Indentify the shape of the SiC!; structure, and give the CI- Si- CI bond angle in SiCI 4? 4eAr",- (oti-5 III. What is the hybridization around the central atom in SiCI.?,3 IV. Is the structure polar or non-polar? Justify your answer.,o",d.sa.. { +O<; -1$ err. I. (b) If you were to design an experiment to identify an unknown compound, would you choose to use an infrared spectrometer or an ultraviolet/visual spectrometer? Justify your answer. "" C)ts U (c) The following questions pertain to the space-filling models below. I. II. Whic:h structure has the greatest bond energy between the central and a terminal atom? Jpstify your answer. to UA.. f_ '\Alt_ k"-s Sl.uA.ller '\A_ $'(UUeA"«()\A,* ll)\l_tt Tl c- C"({ pt. t 4-kl (A'MA +kediq'" '" tx.uc1 VQ."'-«' e'" <;0, ""\.l)o '<;fs txs l.\c.t deut:mes ((o"'-l <lb &u,j) '..e, -AlO '\>t O\.Svdle\AQ.e. -AO\.u. e....,,"-\ll'(. ", + hi(»: a.tq""'-$,,\e e.- i\j\ \M.\.CJ.tu a.t. ",,Q.f" '" "1T"'" 11. Which structure has the greatest amount of potential energy associated with JtsbO?r.1J. (p()\e) &.ue LG\...-\-oS OU ) ) ':p "" a.s v(el.l(1_ t--o OlA. Q. \.u At'pr m "(A,u_c!. '-'4e.. il. 1fa(or CCL.\ \1C.J,,

7 Answer Key Testname: BONDING AND IMF PRACTICE TEST 013 1) E ) E 3) C 4) A 5) A 6) E 7) A 8) E 9) A 10) A 11) C 1) D 13) D 14) E 15) A 16) E 17) C 18) C 19) D 0) B 1) E ) A 3) C 4) B 5) A 6) B 7) B 8) D 9) A 30) C 31) E 3) A 33) E 34) A 35) E 36) C 37) E 38) D 39) D 40) B 41) A 4) C 43) E 44) E 45) D 46) A 47) C 48) D 49) C 50) E 1

8 Answer Key Testname: BONDING AND IMF PRACTICE TEST ) A 5) D 53) C 54) C 55) E 13

Unit-3 Chemical Bonding Practice Exam

Name: Class: _ Date: _ Unit-3 Chemical Bonding Practice Exam Multiple Choice - NO CALCULATORS, show your work and justify your answers. 1. The concentration of a red colored solution of cobalt ions needs