Question :
31.Which of the following statements concerning the boiling points of : 1309641
31.Which of the following statements concerning the boiling points of specific alkanes is correct?
a.Hexane has a higher boiling point than heptane.
b.Pentane has a higher boiling point than 2-methylpentane.
c.Butane has a higher boiling point than cyclobutane.
d.More than one correct response.
e.No correct response.
32.For which of the following alkanes are the products of complete combustion CO2 and H2O?
a.cyclobutane
b.octane
c.2,3,3,4,4-pentamethylheptane
d.more than one correct response
e.no correct response
33.For which of the following halogenated cycloalkanes is cis-trans isomerism possible?
a.1,1-dichlorocyclobutane
b.1-bromo-1-chlorocyclobutane
c.1-bromo-2-chlorocyclobutane
d.more than one correct response
e.no correct response
34.Which of the following cycloalkanes or cycloalkane derivatives contains 10 hydrogen atoms?
a.methylcyclobutane
b.1,2-dimethylcyclobutane
c.1,2-dichlorocyclohexane
d.more than one correct response
e.no correct response
35.Which of the following is a correct pairing of common and IUPAC names for halogenated hydrocarbons?
a.ethyl chloride and dichloromethane
b.isopropyl chloride and 1-chloropropane
c.tert-butyl chloride and 2-chloro-2-methylpropane
d.more than one correct response
e.no correct response
36.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
(1) Alkanes have limited solubility in water and are less dense than water.
(2) Propane is an alkane in which both 1o and 2o carbon atoms are present.
(3) Some, but not all cycloalkanes, can exist is cis-trans isomeric forms.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
37.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
(1) A minimum of four carbon atoms is required in a cycloalkane.
(2) The molecules 2,4-dimethylpentane and 2,4-dimethylhexane are constitutional isomers.
(3) As a result of rotation about single bonds, all alkane molecules, except methane, can exist in an infinite number of conformations.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
38.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
(1) Natural gas and petroleum constitute the largest and most important sources of both alkanes and cycloalkanes.
(2) The number of hydrogen atoms present in an alkane is always twice the number of carbon atoms plus two more.
(3) Unbranched alkane boiling points decrease as carbon chain-length increases.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
39.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
(1) Cis-trans isomers have the same molecular formula and also the same structural formula.
(2) Molecules of the compound 1,3-dichlorocyclohexane contain 12 hydrogen atoms.
(3) The product from the reaction of one molecule of ethane with one molecule of Br2 is 1,2-dibromoethane.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
40.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
(1) The names propyl bromide and 1-bromopropane denote the same compound.
(2) Compounds with the molecular formula C5H10 are alkanes and those with the formula C5H12 are cycloalkanes.
(3) Alkanes readily undergo combustion when ignited to form H2 gas and elemental carbon.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
