CHAPTER 1

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____ 113.____ 114.____ 115.____ 116.a. Consider the three-dimensional shape of the moleculeb. Consider the bond dipoles within the molecule.c. Determine if there is more than one single bond within the molecule.d. Determine if there is an imbalance in charge within the molecule.e. Use the electronegativity values of each atom to determine the polarity of each bond.Which compound is not an aliphatic hydrocarbon?a. propaneb. hexynec. 1,2-dimethylbenzened. 2,2-dimethylheptanee. iso-butaneWhen numbering the main chain or ring of an organic compound, which functional group gets the highestpriority?a. methylb. hydroxylc. halogend. aminee. hydrogenWhich substance is not a structural isomer of hexyne?a. 2-hexyneb. 3-hexynec. 2,2-dimethylpentyned. 4-methyl-1-pentynee. 2,3-dimethylbutadieneWhy does the boiling point of an alkane increase as its chain length increases?a. There is more hydrogen bonding.b. There are more hydrogen atoms available for hydrogen bonds to form.c. The number of dipole-dipole interactions increases.d. The strength of the dispersion forces increases with increased molecular size.e. Heavier molecules cannot float on the surface of water as well.____ 117. How many unshared electron pairs are found in a molecule of formaldehyde, HNCHO? Hint: Draw aLewis structure to help you answer this question.a. noneb. threec. twod. foure. one____ 118. Which shape is used to represent cyclobutane?a. triangleb. squarec. hexagond. octagone. cube____ 119. How many isomers have the molecular formula C H O?5 10
____ 120.____ 121.____ 122.____ 123.a. fourb. fivec. sixd. sevene. threeWhich compounds do perfumers mix to obtain distinctive and attractive scents?a. alcoholsb. ketonesc. aldehydesd. alkanese. cyclic compoundsInfrared spectroscopy allows researchers to determine the kinds of bonds and the functional groups thatare present in a molecule. What does infrared spectroscopy measure?a. the absorption of white lightb. bond stretching, bending, and vibratingc. the degree of absorption of infrared lightd. the emission of infrared light from the organic moleculee. the emission of full-spectrum light from a sampleWhich two compounds react to form an ester?a. a carboxylic acid and an alcoholb. an alcohol and an aldehydec. an alcohol and a ketoned. a carboxylic acid and a ketonee. an aldehyde and a carboxylic acidTo which class does CH3CH2NH 2 belong?a. secondary amineb. primary aminec. secondary amided. primary amidee. tertiary amine
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CHAPTER 1

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