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Hydrocarbons Chapter 25
Test Description: Hydrocarbons chapter 25
Instructions: Answer all questions to get your test result.
1) Which is not an important property of hydrocarbons?
A
low densities
B
poor conductors of electricity
C
low melting points
D
very soluble in water
2) Natural gas, used for heating and generating electricity, consists mostly of the hydrocarbon
A
methane.
B
propane
C
octane.
D
butane.
3) Which of the following is not true of a structural formula for a hydrocarbon?
A
It shows the locations of atoms.
B
It shows the locations of individual bonds
C
It shows a three-dimensional picture.
D
It shows single, double, and triple bonds.
4) Alkanes are distinguished from other hydrocarbons because they have
A
one triple carbon-carbon bond.
B
both double and triple carbon-carbon bonds.
C
one double carbon-carbon bond.
D
only single carbon-carbon bonds
5) What is the general formula for alkanes?
A
CnHn
B
CnH2n-2
C
CnH2n+2
D
CnH2n
6) Alkanes are referred to as saturated hydrocarbons because they are
A
able to form branced structures.
B
filled to capacity with hydrogen atoms.
C
filled with double and/or triple bonds.
D
soluble in water and in other liquids.
7) To find the IUPAC name for a abranced alkane, the first step is to identify the
A
number of branches of carbon atoms.
B
longest continuous chain of carbon atoms.
C
total number of hydrogen atoms.
D
total number of carbon atoms.
8) Alkanes with the same structural formula can have a variety of arrangements because of the
A
possible rotation about the carbon-carbon bond.
B
changing strength of the carbon-hydrogen bond.
C
breaking a reforming of carbon-carbon bonds.
D
sharing of electrons between the carbon atoms.
9) Structures of the same compositions that differ only by bond rotations are referred to as
A
variants.
B
conformations.
C
transitions.
D
transformations.
10) Molecules with the same molecular formula but whose atoms bond in different orders are called structural
A
relatives.
B
metaphors.
C
variants.
D
isomers.
*select an answer for all questions
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