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- 1. Multiple ChoiceThe molecule AX3 is polar and obeys the octet rule; therefore, the central atom Ahas no lone pairs of electronshas one lone pair of electronshas two lone pairs of electronshas three lone pairs of electrons
- 2. Multiple ChoiceWhich of the following statements about polarity is false?Linear molecules can be polar.CCl4 is a polar molecule.Dipole moments can “cancel”, giving a net non-polar molecule.Lone (unshared) pairs of electrons on the central atom play an important role in influencing polarity.
- 3. Multiple ChoiceWhich is the most polar molecule?CH4CF4H2OCO2
- 4. Multiple ChoiceCHF3 is ________ polar than CHBr3 becausemore; the C-F bonds are more polar than the C-Br bonds.less; the C-F bonds are less polar than the C-Br bonds.more; the C-H bond in CHF3 is a non-polar bond.less; the C-H bond in CHF3 is a non-polar bond.
- 5. Multiple Choice
What is the Lewis structure of water with the correct partial charges and non-bonding electrons?ABCD - 6. Multiple ChoiceWhich of the molecules contains polar covalent bonds but is NOT itself a polar molecule?IIIIII¯\_(ツ)_/¯
- 7. Multiple ChoiceConsider the two water molecules pictured. Which statement is correct?The covalent bond A is stronger than the hydrogen bond B.The covalent bond B is stronger than the hydrogen bond A.The hydrogen bond B is stronger than the covalent bond A.The hydrogen bond A is stronger than the covalent bond B.
- 8. Multiple ChoiceWhat types of intermolecular interactions does chloroform (CH3Cl) exhibit?
I) London dispersion
II) dipole-dipole
III) hydrogen bonding
IV) covalent bondingI onlyI and II onlyI and III onlyI, II, and III only - 9. Multiple ChoiceIn which of these compounds would you find ONLY dispersion forces existing between the molecules?
I. NH3
II. CCl4
III. CH2Cl2
IV. HBrI, III, and IV onlyI and IV onlyIII onlyII only - 10. Multiple ChoiceConsiderthe following 4 forces or interactions:
covalent bonding;
dispersion forces;
hydrogen bonding;
dipole-dipole interactions
Which of the following correctly lists these four types of interactions/forces according to increasing strength (weakest to strongest)?covalent; hydrogen; dipole; dispersiondispersion; hydrogen; dipole; covalentcovalent; dipole; hydrogen; dispersiondispersion; dipole; hydrogen; covalent - Answer choicesTagsAnswer choicesTags