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Exam 12: Saturated Hydrocarbons

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Question 31

Multiple Choice

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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) All halogenated hydrocarbons have densities that are greater than that of water. (2) Substituents are present in some, but not all, branched chain alkane molecules. (3) There are two four-carbon branched-chain alkane constitutional isomers.

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.

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Question 32

Multiple Choice

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From the response list, select the correct number of constitutional isomers that exist for dichloroethanes

A) two
B) three
C) four
D) five

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Question 33

Multiple Choice

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Which of the following is a correct alkane structural formula?

In which of the following pairs of alkanes are the two members of the pair constitutional isomers?

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) Methane, the simplest alkane, is a major component of the atmospheres of Jupiter and Saturn but only a minor component of Earth's atmosphere. (2) Some solid-state alkanes find use as skin-softeners and skin-protectors. (3) HFO's are fluorinated hydrocarbons in which a carbon-carbon double bond is present.

When the molecular formulas for cyclic and noncyclic alkanes with the same number of carbon atoms are compared, it is always found that the cycloalkane has

How many carbon atoms are present in the alkane whose IUPAC name is 2,2,4-trimethylpentane?

Which of the following statements concerning saturated hydrocarbons is incorrect?

Which of the following alkanes has an IUPAC name that contains the word butane?

Select from the response list a compound that has both primary and quaternary carbon atoms present.

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.

Which of the following statements concerning the boiling points of specific alkanes is correct?

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.

The most important chemical use for alkanes relates to their chemical reaction with

Select from the response list a compound that has two secondary carbon atoms present.

Which of the following statements concerning cycloalkanes is correct?

The representation for the alkane propane is an example of

For which of the following cycloalkanes is cis-trans isomerism possible?

Which of the following could not be the molecular formula for an alkane molecule?

From the response list, select the correct number of constitutional isomers that exist for a four-carbon cycloalkane.