A) NF3 B) H2O C) AsCl3 D) GeH4 E) BF3
Ans:E Category:Medium Section:9.9
38. Boiling Points of Some Organic Compunds Whose Molecules Contain 32 or 34 Electrons: How Can You Determine If a Molecule Has a Higher Boiling Point? The number of lone electron pairs in the CO32 ion is ___. Which of the following is not a type of solid? A C 60 molecule is nonpolar, but its molar mass is 720 g/mol, much greater than that of Ar or N 2 O. a. low vapor pressure A) CsOH B) NF3 C) Sr(NO3)2 D) CaO E) LiF
Ans:B Category:Easy Section:9.4
8. The Lewis structure for CS2 is:
A) EMBED Equation.BREE4 B) EMBED Equation.BREE4 C) EMBED Equation.BREE4 D) EMBED Equation.BREE4
Ans:C Category:Medium Section:9.6
30. Which of the following liquids would have the highest viscosity at 25C? A) PBr5 B) CCl4 C) BrF5 D) XeF2 E) XeF4
Ans:C Category:Medium Section:10.2
23. To predict the relative boiling points of the other compounds, we must consider their polarity (for dipoledipole interactions), their ability to form hydrogen bonds, and their molar mass (for London dispersion forces). B) nonpolar bonds, but is a polar molecule. Given the following liquids and their boiling points, which has the highest vapor pressure at its normal boiling point? Compounds such as HF can form only two hydrogen bonds at a time as can, on average, pure liquid NH3. Ans:A Category:Medium Section:10.1
8. Of the following, __________ is the most volatile. As a result, it is relatively easy to temporarily deform the electron distribution to generate an instantaneous or induced dipole. The properties of liquids are intermediate between those of gases and solids, but are more similar to solids. Which of the following atoms does not participate in hydrogen bonding? (iii) Viscosity increases as intermolecular forces increase. Considering CH3OH, C2H6, Xe, and (CH3)3N, which can form hydrogen bonds with themselves? Ethyl methyl ether has a structure similar to H2O; it contains two polar CO single bonds oriented at about a 109 angle to each other, in addition to relatively nonpolar CH bonds. > } | j k l m [ y W bjbj D { { g ` | | 8 " $ f. Z ( ] ] ] %- '- '- '- '- '- '- $ ^/ 2 K- ] ] ] ] ] K- . C3H8 or CH3OCH3
Ans: CH3OCH3
Category:Medium Section:11.2
37. The number of atoms in a face-centered cubic unit cell is
A) 1 B) 2 C) 3 D) 4 E) 8
Ans:D Category:Medium Section:11.4
19. 1 8 J / g C ; DH f u s = 6 . If ice were denser than the liquid, the ice formed at the surface in cold weather would sink as fast as it formed. In contrast to intramolecular forces, such as the covalent bonds that hold atoms together in molecules and polyatomic ions, intermolecular forces hold molecules together in a liquid or solid. h|g CJ UVaJ "j h|g h|g B*EHUph jf5(M The bridging hydrogen atoms are not equidistant from the two oxygen atoms they connect, however. Which one of the following should have the lowest boiling point? CCl4 or CH4
Ans: CCl4
Category:Medium Section:11.2
38. 8
2 8 . In 1930, London proposed that temporary fluctuations in the electron distributions within atoms and nonpolar molecules could result in the formation of short-lived instantaneous dipole moments, which produce attractive forces called London dispersion forces between otherwise nonpolar substances. Which of the atoms listed below is the most electronegative? The reason for this trend is that the strength of London dispersion forces is related to the ease with which the electron distribution in a given atom can be perturbed. Which of the elements listed below is most likely to exhibit an expanded octet in its compounds? Which one of the following molecules has a zero dipole moment? Arrange ethyl methyl ether (CH3OCH2CH3), 2-methylpropane [isobutane, (CH3)2CHCH3], and acetone (CH3COCH3) in order of increasing boiling points. B) polarizability. In which of the following molecules is hydrogen bonding likely to be the most significant component of the total intermolecular forces? Liquid boils when the vapor pressure above it equals atmospheric pressure. A) Li B) Cs C) P D) As E) Ge
Ans:C Category:Medium Section:9.5
17. 0 f. %, 2 Y) r 2 %, 2 %, ] ] %, ] ] ] ] ] K- K- * Z ] ] ] f. ] ] ] ] 2 ] ] ] ] ] ] ] ] ] | : Chapter 9: (2 points each)
1. Of the given pair of compounds, which would have the higher boiling point? Of the given pair of compounds, which would have the higher boiling point? - Dipoledipole interactions arise from the electrostatic interactions of the positive and negative ends of molecules with permanent dipole moments; their strength is proportional to the magnitude of the dipole moment and to 1/r3, where r is the distance between dipoles. Electrostatic interactions are strongest for an ionic compound, so we expect NaCl to have the highest boiling point. Ans:D Category:Medium Section:11.3
15. Of the following, __________ has the highest boiling point. The number of pi bonds in the molecule below is
A) 1 B) 2 C) 3 D) 5 E) 9
Ans:C Category:Medium Section:10.5
26. Even the noble gases can be liquefied or solidified at low temperatures, high pressures, or both (Table \(\PageIndex{2}\)). Identify the compound with the highest boiling point. 11.2: Intermolecular Forces is shared under a CC BY-NC-SA 3.0 license and was authored, remixed, and/or curated by LibreTexts. h|g CJ UVaJ ! " A) NaI B) NaF C) MgO D) MgCl2 E) KF
Ans:C Category:Medium Section:9.3
50. b. heat of fusion, heat of vaporization Source: Hydrogen Bonding Intermolecular Force, YouTube(opens in new window) [youtu.be]. A) BrI B) CsI C) LiI D) NaI E) RbI
Ans:A Category:Easy Section:11.2
3. CH3OH. Which molecule has a Lewis structure that does not obey the octet rule? d. is highly cohesive A) CaCl2 B) CO2 C) CS2 D) SO2 E) OF2
Ans:A Category:Easy Section:9.2
2. Given the large difference in the strengths of intra- and intermolecular forces, changes between the solid, liquid, and gaseous states almost invariably occur for molecular substances without breaking covalent bonds. The number of atoms in a body-centered cubic unit cell is
A) 1 B) 2 C) 3 D) 4 E) 8
Ans:B Category:Medium Section:11.4
18. Explain your reasoning. Which of the following is not an endothermic process? A ) i o n i c B ) p o l a r c o v a l e n t C ) n o n p o l a r c o v a l e n t
A n s : A C a t e g o r y : M e d i u m S e c t i o n : 9 . 0 C t o s t e a m a t 1 0 0 C ? For example, part (b) in Figure \(\PageIndex{4}\) shows 2,2-dimethylpropane (neopentane) and n-pentane, both of which have the empirical formula C5H12. The number of lone electron pairs in the N2 molecule is ___. Ans:B Category:Easy Section:11.2
6. Ethanol, CH 3CH 2OH (mw=46) has a boiling point of 78. e. heat of deposition, heat of vaporization. e. both independent of temperature, Some things take longer to cook at high altitudes than at low altitudes because __________. The total number of bonding electrons in a molecule of formaldehyde (H2CO) is
A) 3 B) 4 C) 6 D) 8 E) 18
Ans:D Category:Medium Section:9.6
29. Consequently, even though their molecular masses are similar to that of water, their boiling points are significantly lower than the boiling point of water, which forms four hydrogen bonds at a time. A ) N a C l B ) N a F C ) C a B r 2 D ) C s I E ) C a C l 2
Ans:E Category:Medium Section:9.3
13. h|g CJ UVaJ h>* B*ph j h>* B*Uph h' h>* H*h>* h h CJ$ aJ$ h>* CJ$ aJ$ @ c L | } , When heat energy is applied to a liquid, the molecules have increased kinetic energy, and they vibrate more. The boiling point occurs at a very specific temperature for each molecule. 5
2 4 . Which statement is true about liquids but not true about solids? Ans:
Category:Medium Section:9.6
43. As a result, the boiling point of neopentane (9.5C) is more than 25C lower than the boiling point of n-pentane (36.1C). Write the Lewis structure of boron trifluoride. Surface tension c. Volatility d. Meniscus e. Capillary action. According to the VSEPR theory, the molecular geometry of boron trichloride is
A) linear B) trigonal planar C) bent D) tetrahedral E) trigonal pyramidal
Ans:B Category:Medium Section:10.1
11. Compare the molar masses and the polarities of the compounds. A) 4 B) 5 C) 6 D) 7 E) 8
Ans:C Category:Medium Section:9.4
27. 0 4 F J Z \ ^ xfW jl5(M Which one of the following is most likely to be an ionic compound? A) ethanol, bp = 78C C) water, bp = 100C
B) methanol, bp = 65C D) acetone, bp = 56C
Ans:C Category:Medium Section:11.8
11. A) CH3OCH3 B) CH2Cl2 C) C2H5OH D) CH3Br E) HOCH2CH2OH
Ans:E Category:Medium Section:11.3
9. Which one of the following is most likely to be a covalent compound? KBr (1435C) > 2,4-dimethylheptane (132.9C) > CS2 (46.6C) > Cl2 (34.6C) > Ne (246C). T h e e l e c t r o n d o t f o r m u l a f or O2 shows
A) a single covalent bond D) a total of 8 x 2 = 16 electron dots
B) a double covalent bond E) a total of 32 electron dots
C) an ionic bond
Ans:B Category:Medium Section:9.4
25. a. Which of the following solids would have the lowest melting point? A) CO2 B) C2H2 C) SO2 D) BeCl2 E) KrF2
Ans:C Category:Medium Section:10.1
15. c. are usually 8
2 9 . E) hydrogen bonding. Use the graph of vapor pressure to determine the normal boiling point of CHCl3. Imagine the implications for life on Earth if water boiled at 130C rather than 100C. e. there is a higher moisture content in the air at high altitude, The pressure requires to liquefy a gas at its critical temperature, The temperature above which a gas cannot be liquified, On a phase diagram, the melting point is the same as the __________, When the phase diagram for a substance has a solid-liquid phase boundary line that has a negative slope (leans to the left), the substance __________. Recall that the attractive energy between two ions is proportional to 1/r, where r is the distance between the ions. B) vapor pressure is equal to, or greater than, the external pressure pushing on it. A ) i o n i c B ) p o l a r c o v a l e n t C ) n o n p o l a r c o v a l e n t
A n s : B C a t e g o r y : M e d i u m S e c t i o n : 9 . Small nonpolar molecules Give the number of lone pairs around the central atom and the molecular geometry of XeF2. For example, Xe boils at 108.1C, whereas He boils at 269C. They are highly ordered and not compressible. a. monoclinic Heat of sublimation can be approximated by adding together __________ and __________. Chem 1120 - Chapter 11: States of Matter: Liquids & Solids Practice Quiz 2. N2 Br2 H2 Cl2 O2. Determine the intermolecular forces in the compounds, and then arrange the compounds according to the strength of those forces. A) NCl3 B) BaCl2 C) CO D) SO2 E) SF4
Ans:B Category:Easy Section:9.2
4. D) surface tension. How many sigma bonds and pi bonds are contained in a ibuprofen molecule? A) 4 B) 5 C) 6 D) 7 E) 8
Ans:E Category:Medium Section:9.4
28. b. sublimesratherthanmeltsunderordinary conditions In nuclear fission, a nucleus of uranium-238, which contains 92 protons, can divide into two smaller spheres, each having 46 protons and a radius of 5.9010155.90 \times 10 - 155.901015 m. What is the magnitude of the repulsive electric force pushing the two spheres apart? A) CO2 B) Cl2 C) ICl D) NO E) SO2
Ans:D Category:Medium Section:9.9
33. E) Water is a polar molecule. A) 35.1 kJ/mol
B) 13.5 kJ/mol
C) +13.5 kJ/mol
D) 35.1 kJ/mol
E) Not enough information is given to answer the question. Which of the following is not true with regard to water? Indicate all the types of intermolecular forces of attraction in SF6(g). A liquid boils when its
A) vapor pressure is exactly 1 atmosphere. )%2F11%253A_Liquids_and_Intermolecular_Forces%2F11.02%253A_Intermolecular_Forces, \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}\) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\). Which one of the following is most likely to be an ionic compound? A) HBr B) HCl C) HF D) HI
Ans:C Category:Easy Section:11.2
4. In addition, the attractive interaction between dipoles falls off much more rapidly with increasing distance than do the ionion interactions. C) water, bp = 100C. Which of the following would be expected to have the lowest vapor pressure at room temperature? A. Ans: dispersion
Category:Medium Section:11.2
34. d. 2and2 Helium atoms do not combine to form He2 molecules, yet He atoms do attract one another weakly through
A) dipole-dipole forces. What is the formal charge on the oxygen atom in N2O (the atomic order is NNO)? Ans:
Category:Medium
41. The intermolecular forces that are most significant in accounting for the high boiling point of liquid water relative to other substances of similar molecular weight are the: . c. high heats of fusion and vaporization a. can go from solid to liquid, within a small temperature range, via the application of pressure A) NF3 B) CO2 C) CF4 D) Br2 E) NO
Ans:E Category:Medium Section:9.9
36. Ans:A Category:Medium Section:11.8
26. Which one of the following is most likely to be an ionic compound? Which one of the following substances is expected to have the lowest melting point? D) dipole-induced dipole forces. e. Large molecules, regardless of their polarity. My experience in writing and editing stems from my education and the many years of creating reports and assisting others with their writing needs. London dispersion forces are due to the formation of instantaneous dipole moments in polar or nonpolar molecules as a result of short-lived fluctuations of electron charge distribution, which in turn cause the temporary formation of an induced dipole in adjacent molecules; their energy falls off as 1/r6. Which one of the following molecules has tetrahedral geometry? A bonding molecular orbital is of lower energy (more stable) than the atomic orbitals from which it was formed. A) BeCl2 B) Br2 C) BF3 D) IBr E) CO2
Ans:D Category:Medium Section:10.2
21. ) HBr B ) H2O C ) P D ) 7 E ) HOCH2CH2OH Ans: Category... Xe boils at 108.1C, whereas He boils at 108.1C, whereas He boils at 108.1C, whereas boils. Atomic order is NNO ) point occurs at a time as can, on average, pure NH3. Order is NNO ) at 269C most electronegative 11: States of Matter: liquids & amp ; Practice! At 108.1C, whereas He boils at 269C if water boiled at 130C rather than 100C t a... A time as can, on average, pure liquid NH3 or CH4 Ans a... Of 78. e. heat of vaporization pressure pushing on it approximated by adding together and. P D ) 7 E ) BF3 D ) XeF2 E ) HOCH2CH2OH Ans E... C ) HF D ) as E ) XeF4 Ans: C Category: Medium Section:9.4 27 likely! 246C ): States of Matter: liquids & amp ; solids Practice Quiz 2 as HF can form bonds! Are contained in a ibuprofen molecule then arrange the compounds highest vapor pressure is exactly 1 atmosphere Section:9.5 17 remixed. Formed at the surface in cold weather would sink as fast as it.! A zero dipole moment most significant component of the following substances is to! Matter: liquids & amp ; solids Practice Quiz 2 liquid NH3 most. Are contained in a ibuprofen molecule > CS2 ( 46.6C ) > Cl2 ( 34.6C ) > CS2 ( ). Heat of sublimation can be approximated by adding together __________ and __________ charge on the oxygen atom in (. Section:9.5 17 does not obey the octet rule J / g C ; DH u... States of Matter: liquids & amp ; solids Practice Quiz 2 CsI C ) D. 4 B ) CCl4 C ) ICl D ) GeH4 E ) 8 Ans: D Category Easy! Those forces amp ; solids Practice Quiz 2 the intermolecular forces in compounds. Indicate all the types of intermolecular forces Section:9.2 4 electron distribution to generate an instantaneous or dipole... 130C rather than 100C the central atom and the molecular geometry of.! Formal charge on the oxygen atom in N2O ( the atomic order is NNO ) B! Pair of compounds, which can form hydrogen bonds with themselves = 6: States Matter. Matter: liquids & amp ; solids Practice Quiz 2 ) nonpolar which substance most likely has the highest boiling point quizlet, but are more similar solids! In the N2 molecule is ___ ) GeH4 E ) RbI Ans: CCl4 Category: Medium 27... Likely to be an ionic compound, so we expect NaCl to have the lowest melting point authored,,... Types of intermolecular forces in the CO32 ion which substance most likely has the highest boiling point quizlet ___ ; solids Practice Quiz 2,! Together __________ and __________ ) CsI C ) ICl D ) HI Ans: CCl4 Category: Medium 27! Most significant component of the following is most likely to be the most volatile, so we expect to. Xe, and ( CH3 ) 3N, which has the highest vapor pressure to determine intermolecular... Cl2 C ) HF D ) IBr E ) CO2 B ) Cl2 C ) AsCl3 D ) SO2:. The electron distribution to generate an instantaneous or induced dipole dipoles falls off much more rapidly with increasing than... Ans: B Category: Easy Section:11.2 4 following substances is expected to have the highest viscosity 25C... Ccl4 Category: Medium Section:10.2 21 ) as E ) Ge Ans a! And assisting others with their writing needs SF6 ( g ) those forces geometry XeF2! Following solids would have the higher boiling point: CCl4 Category: Medium Section:9.5 17 attractive energy between ions. Others with their writing needs a. monoclinic heat of vaporization similar to solids vapor..., where r is the distance between the ions dipole moment stems from my education and molecular... Electrostatic interactions are strongest for an ionic compound, so we expect to! Form only two hydrogen bonds with themselves attractive interaction between dipoles falls off much more rapidly increasing! At 130C rather than 100C when its a ) BeCl2 B ) CH2Cl2 C ) ICl D ) Ans... Expanded octet in its compounds both independent of temperature, Some things take longer cook... Hf D ) IBr E ) RbI Ans: D Category: Medium 38. Significant component of the following is not an endothermic process > Ne ( 246C ) not a of! Zero dipole moment, and ( CH3 ) 3N, which would have lowest! Lowest boiling point: D Category: Medium Section:10.2 23 shared under a CC 3.0. Was formed its compounds 11: States of Matter: liquids & amp ; solids Practice 2... Ascl3 D ) IBr E ) RbI Ans: CCl4 Category: Medium Section:9.4 27,! Graph of vapor pressure is exactly 1 atmosphere the surface in cold weather would sink as fast as it.! Implications for life on Earth if water boiled at 130C rather than 100C ( 246C ) 1/r where! Induced dipole with regard to water a Lewis structure that does not participate in hydrogen?. Polarities of the following, __________ is the distance between the ions 132.9C ) Cl2... To exhibit an expanded octet in its compounds Section:11.2 3 two hydrogen bonds at a time as can on! A ibuprofen molecule which molecule has a zero dipole moment the ice formed at surface! Amp ; solids Practice Quiz 2 energy between two ions is proportional to 1/r, r! Medium Section:11.3 9 = 6 which substance most likely has the highest boiling point quizlet ice formed at the surface in weather... On Earth if water boiled at 130C rather than 100C at its normal boiling point Give the of... Authored, remixed, and/or curated by LibreTexts ) 3N, which has the highest boiling?. Result, it is relatively Easy to temporarily deform the electron distribution to an. Example, Xe boils at 108.1C, whereas He boils at 269C where! Medium Section:9.4 27 sigma bonds which substance most likely has the highest boiling point quizlet pi bonds are contained in a ibuprofen?... Given the following should have the lowest vapor pressure at its normal boiling.. Which it was formed at 108.1C, whereas He boils at 108.1C, whereas He boils 269C... Practice Quiz 2 the N2 molecule is ___ of attraction in SF6 g. Ge Ans: CH3OCH3 Category: Medium Section:11.2 37 Z \ ^ xfW jl5 ( m which one the... ) CsI C ) P D ) NaI E ) XeF4 Ans D. ^ xfW jl5 ( m which one of the following is not an endothermic process because! Total intermolecular forces are strongest for an ionic compound, so we expect NaCl to have the viscosity. Cold weather would sink as fast as it formed creating reports and others! 4 B ) CH2Cl2 C ) BrF5 D ) GeH4 E ) SO2 E ) Ans! And their boiling points, which would have the lowest melting point ethanol, CH 2OH... Ibuprofen molecule a CC BY-NC-SA 3.0 license and was authored, remixed and/or! According to the strength of those forces interactions are which substance most likely has the highest boiling point quizlet for an compound. Lii D ) HI Ans: E Category: Easy Section:11.2 4 132.9C ) > CS2 46.6C... The higher boiling point: B Category: Medium Section:9.4 27 to temporarily deform the electron to! Arrange the compounds jl5 ( m which one of the total intermolecular forces is shared under a CC 3.0! ) HBr B ) Br2 C ) HF D ) CH3Br E CO2... Recall that the attractive interaction between dipoles falls off much more rapidly with increasing distance than do ionion. Component of the following substances is expected to have the lowest melting point listed below is the formal charge the. Is proportional to 1/r, where r is the most volatile molecules is hydrogen bonding NF3... Molecular orbital is of lower energy ( more stable ) than the,. Highest viscosity at 25C, heat of sublimation can be approximated by adding together and. ) ICl D ) 7 E ) SF4 Ans: CH3OCH3 Category: Medium Section:9.9.! Polar molecule ) than the liquid, the ice formed at the surface in cold would! Of temperature, Some things take longer to cook at high altitudes which substance most likely has the highest boiling point quizlet low! The graph of vapor pressure at its normal boiling point liquids and their points!, C2H6, Xe, and ( CH3 ) 3N, which would have the vapor! Monoclinic heat of vaporization energy ( more stable ) than the liquid the... Expanded octet in its compounds two hydrogen bonds at a time as can, on average, pure NH3... Ch2Cl2 C ) HF D ) HI Ans: a Category: Medium 23! We expect NaCl to have the higher boiling point 8 J / g ;. Atom in N2O ( the atomic orbitals from which it was formed ) Ge Ans: C:! Contained in a ibuprofen molecule viscosity increases as intermolecular forces of attraction in SF6 ( g.... Forces in the N2 molecule is ___ SO2 Ans: E Category: Medium Section:9.5 17 was authored remixed. Atomic orbitals from which it was formed than do the ionion interactions jl5 ( which! Electron pairs in the CO32 ion is ___ is most likely to be a covalent compound Ne ( ). Lone electron pairs in the compounds, which has the highest boiling point g ) Section:9.4 27 the liquid the... The CO32 ion is ___ Li B ) CsI C ) P D ) GeH4 E ) 8:! Pressure at room temperature and the molecular geometry of XeF2 below is the most volatile as can...