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Brown and Poon Chapter 3 True/False
Brown and Poon Chapter 3 Quick Quiz
32
Organic Chemistry
Undergraduate 3
02/08/2012

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Term
Combustion of alkanes is an endothermic process. (3.9)
Definition
False
Term
All alkanes that are liquid at room temperature are more dense than water. (3.8)
Definition
False
Term
The two main sources of alkanes in the world are petroleum and natural gas. (3.10)
Definition
True
Term
There are 4 alkyl groups with the molecular formula C4H9 (3.3)
Definition
True
Term
Sets of constitutional isomers have the same molecular formula and the same physical properties. (3.2)
Definition
False
Term
A hydrocarbon is composed of only carbon and hydrogen. (3.1)
Definition
True
Term
The products of complete combustion of an alkane are carbon dioxide and water. (3.9)
Definition
True
Term
Alkanes and cycloalkanes show cis-trans isomerization. (3.6)
Definition
False
Term
Alkenes and alkynes are unsaturated hydrocarbons. (3.1)
Definition
True
Term
There are two constitutional isomers with the molecular formula C4H10. (3.2)
Definition
True
Term
Hexane and cyclohexane are constitutional isomers (3.4)
Definition
False
Term
The propyl and isopropyl groups are constitutional isomers (3.3)
Definition
True
Term
There are five constitutional isomers with the molecular formula C5H12. (3.2)
Definition
False
Term
Boiling points among alkanes with unbranched carbon chains increase as the number of carbons in the chain increases. (3.8)
Definition
True
Term
In a cyclohexane ring, if an axial bond is above the plane of the rind on a particular carbon atom, axial bonds on the two adjacent carbons are below the plane of the ring. (3.5)
Definition
True
Term
ractional distillation of petroleum separates hydrocarbons based on their melting points. (3.10)
Definition
False
Term
Among alkane constitutional isomers, the least branched isomer generally has the lowest boiling point. (3.8)
Definition
False
Term
The parent name of a cycloalkane is the name of the unbranched alkane with the same number of carbon atoms as are in the cycloalkane ring. (3.4)
Definition
True
Term
Octane and 2,2,4-trimethylpentane are constitutional isomers and have the same octane number. (3.10)
Definition
False
Term
Liquid alkanes and cycloalkanes are soluble in each other. (3.8)
Definition
True
Term
Alkanes and cycloalkanes are insoluble in water. (3.8)
Definition
True
Term
The more stable chair conformation of a substituted cyclohexane has the greater number of substituents in equatorial positions. (3.5)
Definition
True
Term
The parent name of an alkane is the name of the longest chain of carbon atoms (3.3)
Definition
True
Term
Alkanes are saturated hydrocarbons. (3.1)
Definition
True
Term
The general formula for an alkane is CnH2n where n is the number of carbon atoms in the alkane. (3.1)
Definition
False
Term
The octane number of a particular gasoline is the number of grams of octane per liter. (3.10)
Definition
False
Term
Cis and trans isomers have the same molecular formula, the same connectivity, and the same physical properties. (3.8)
Definition
False
Term
A cis isomer of a disubstituted cycloalkane can be converted to a trans isomer by rotation about an appropriate carbon-carbon single bond. (3.6)
Definition
False
Term
All cycloalkanes with two substituents on the ring show cis-trans isomerism. (3.6)
Definition
False
Term
In all conformations of ethane, propane, butane, and higher alkanes, all C-C-C and C-C-H bond angles are approximately 109.5o. (3.5)
Definition
True
Term
Conformations have the same molecular formula and the same connectivity, but differ in the 3-dimensional arrangements of their atoms in space. (3.5)
Definition
True
Term
Constitutional isomers have the same molecular formula and the same connectivity of their atoms. (3.2)
Definition
False
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