Chemistry 1152 Final UPDATED ACTUAL Questions and CORRECT Answers
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Course
Chemistry 1152
Institution
Chemistry 1152
Chemistry 1152 Final UPDATED ACTUAL
Questions and CORRECT Answers
What is the general formula of an alkane? - CORRECT ANSWER- CnH2n+2
What type of bonds to alkanes have? - CORRECT ANSWER- Single C-C
What type of arrangement do all carbon atoms have? - CORRECT ANSWER-
Tetrahedral
Chemistry 1152 Final UPDATED ACTUAL
Questions and CORRECT Answers
What is the general formula of an alkane? - CORRECT ANSWER- ✔✔CnH2n+2
What type of bonds to alkanes have? - CORRECT ANSWER- ✔✔Single C-C
What type of arrangement do all carbon atoms have? - CORRECT ANSWER-
✔✔Tetrahedral
What is the IUPAC rule for naming alkanes? - CORRECT ANSWER- ✔✔Take the prefix
and add -ane
ex: methane, butane, hexane
If an "n" is placed in front of an alkane, what does that mean? - CORRECT ANSWER- ✔✔It
is normal or linear
How are carbon atoms classified? - CORRECT ANSWER- ✔✔Classified by the number of
attached carbon atoms (primary, secondary, and tertiary)
What is an alkyl group composed of? - CORRECT ANSWER- ✔✔One or more carbon
atoms attached to a carbon chain
How is an alkyl group derived? - CORRECT ANSWER- ✔✔Removing one hydrogen from
the corresponding alkane
How is an alkyl group named? - CORRECT ANSWER- ✔✔Replace the -ane ending with -yl
ex: methane becomes methyl
According to the IUPAC system, how are branches listed? - CORRECT ANSWER-
✔✔Alphabetical order
,How are constitutional isomers written? - CORRECT ANSWER- ✔✔Write the continuous
chain, remove one CH3, attach as branch
ex: Butane becomes 2-Methyl Propane
What is a haloalkane? - CORRECT ANSWER- ✔✔An alkane where one or more H atoms
are replaced by a halogen atom
What are simple haloalkanes named? - CORRECT ANSWER- ✔✔Alkyl halides
What are the halogen prefixes? - CORRECT ANSWER- ✔✔fluoro, chloro, bromo, and iodo
How are substituents named? - CORRECT ANSWER- ✔✔Alphabetical order with the lowest
numbering possible
ex: 4-bromo-2-chlorohexane
How do you name with multiple halides? - CORRECT ANSWER- ✔✔-If more than one of
the same type of halogen is present, use prefixes di, tri, tetra
-If there are several different halogens, number them and list them in alphabetical order
What is the general formula of cycloalkanes? - CORRECT ANSWER- ✔✔CnH2n
How are cycloalkanes named? - CORRECT ANSWER- ✔✔With the prefix cyclo- in front of
the corresponding alkane name
How do you name cycloalkanes with substituents? - CORRECT ANSWER- ✔✔-One
substituent is named by placing the name of the substituent in front of the cycloalkane name
-Two or more substituents are named by numbering the ring in the direction that gives the
lower numbers to the substituents
What does the rigid ring in a cyclic structure prevent? - CORRECT ANSWER- ✔✔Rotation
of substituents bonded to the ring
,A cyclic structure with two substituents has two isomers called what? - CORRECT
ANSWER- ✔✔Cis-Trans Isomers
What is a cis isomer? - CORRECT ANSWER- ✔✔Two substituents on the same side of the
ring
What is a trans isomer? - CORRECT ANSWER- ✔✔Two substituents on opposite sides of
the ring
What is the polarity and solubility of alkanes? - CORRECT ANSWER- ✔✔Nonpolar and
insoluble
What are the melting and boiling points of alkanes like? - CORRECT ANSWER- ✔✔Low
melting and low boiling points
Boiling points for alkanes are: - CORRECT ANSWER- ✔✔Lower for branched alkanes and
higher for cycloalkanes
Why are alkanes typically not very reactive? - CORRECT ANSWER- ✔✔Strong C-C single
bonds
What is the most typical reaction for alkanes and what is produced? - CORRECT ANSWER-
✔✔Combustion: CO2, H2O, and energy
What are the steps to balancing a combustion equation? - CORRECT ANSWER- ✔✔1. Write
the reactants and the products
2. Balance C
3. Balance H
4. Balance O with O2
What is halogenation? - CORRECT ANSWER- ✔✔When an alkane reacts with a halogen
, What is it called when one or more H atoms is replaced with a halogen? - CORRECT
ANSWER- ✔✔Substitution
What are saturated hydrocarbons? - CORRECT ANSWER- ✔✔-Carbons that have the
maximum number of hydrogen atoms attached to each carbon atoms
-Alkanes and cycloalkanes with single C-C bonds
What are unsaturated hydrocarbons? - CORRECT ANSWER- ✔✔-Carbons that have fewer
hydrogen atoms attached to the carbon chain than alkanes
-Are Alkenes with double bonds or alkynes with triple bonds
How do you name alkenes and alkynes? - CORRECT ANSWER- ✔✔Replace the -ane
ending with -ene for alkenes and -yne for alkynes
When a carbon chain has 4 or more carbons and a double to triple bond, how is it numbered?
- CORRECT ANSWER- ✔✔Give the lowest number to the double or triple bond
How do you name cis-trans isomers? - CORRECT ANSWER- ✔✔The prefixes cis or trans
are placed in front of the alkene name when there are cis-trans isomers
In an addition reaction, where are the reactants added? - CORRECT ANSWER- ✔✔To the
carbon atoms in the double or triple bond, making them disappear
What is hydrogenation? - CORRECT ANSWER- ✔✔A reaction where hydrogen atoms add
to the carbon atoms of a double or triple bond
What are some catalysts used in hydrogenation? - CORRECT ANSWER- ✔✔Pt or Ni
How do you test for double or triple bonds? - CORRECT ANSWER- ✔✔Add Br2, if the red
color remains, there is only single bonds because no reaction occurs
What is hydrohalogenation? - CORRECT ANSWER- ✔✔The atoms of a hydrogen halide
add to the carbon atoms of a double or triple bond
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