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. Topic 10: Organic Chemistry
8. Alkene hydrocarbons: Recalling concept facts and definitions
1. Which best describes bonding in all alkene molecules?
1) The must contain all single bonds
3) They must contain one triple bond
2) They must contain one double bond 4) They must contain a double and a triple bond
2. Which formula correctly represents general formula for all alkene molecules?
1) CnH2n 2) CnH2n+2 3) CnH2n-2 4) CnH2n+6
3. What is the IUPAC name ending for all alkene compounds?
1) –yl 2) –yne 3) –ene 4) –ane
4. The number of electrons shared between two adjacent carbons in a double bond is
1) 1 2) 2 3) 3 4) 4
5. How many pairs of electrons are found between two double-bonded carbon atoms in an alkene
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molecule?
1) 2 2) 4 3) 6 4) 8
6. As the compounds in the alkene series are considered in other of increasing number of carbons,
the ratio of carbon atoms to hydrogen atoms
1) Increases 2) Decreases 3) Remains the same
7. As the length of the chain of carbon atoms in molecules of alkene series increases, the number of
double bonds per molecule
1) Increases 2) Decreases 3) Remains the same
8. Which are true of all alkenes?
1) They contain all single bonds and are saturated hydrocarbons
2) They contain one triple bond and are unsaturated hydrocarbons
3) They contain one double bond and are saturated hydrocarbons
1) C4H6 and C4H10 Teacher Preview Copy
4) They contain one double bond and are unsaturated hydrocarbons
9. Alkene hydrocarbons: Recognizing names and formulas of alkenes
1. Which two compounds belong to the alkene series of hydrocarbon?
1) Pentane and pentene 3) Propene and butene
2) Ethane and ethyne
4) Butene and propyne
2. Which set of IUPAC names are of compounds that are classified as alkenes?
1) Methyl and ethyl 3) Ethane and pentene
2) Ethene and decene 4) Ethyne and ethane
3. Which two formulas are of compounds belonging to the alkene series of hydrocarbons?
1) C2H4 and C11H22
3) C3H4 and C3H8
2) C2H6 and C3H4 4) C3H6 and C3H4
4. Which two formulas are of chemical substances belonging to the alkene homologous series?
2) C4H6 and C4H8 3) C6H10 and C7H14
4) C6H12 and C7H14
5. Which set of structural formulas correctly represents members of the alkene series?
1) 3)
2) 4)
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 293
8. Alkene hydrocarbons: Recalling concept facts and definitions
1. Which best describes bonding in all alkene molecules?
1) The must contain all single bonds
3) They must contain one triple bond
2) They must contain one double bond 4) They must contain a double and a triple bond
2. Which formula correctly represents general formula for all alkene molecules?
1) CnH2n 2) CnH2n+2 3) CnH2n-2 4) CnH2n+6
3. What is the IUPAC name ending for all alkene compounds?
1) –yl 2) –yne 3) –ene 4) –ane
4. The number of electrons shared between two adjacent carbons in a double bond is
1) 1 2) 2 3) 3 4) 4
5. How many pairs of electrons are found between two double-bonded carbon atoms in an alkene
Teacher Preview Copy
molecule?
1) 2 2) 4 3) 6 4) 8
6. As the compounds in the alkene series are considered in other of increasing number of carbons,
the ratio of carbon atoms to hydrogen atoms
1) Increases 2) Decreases 3) Remains the same
7. As the length of the chain of carbon atoms in molecules of alkene series increases, the number of
double bonds per molecule
1) Increases 2) Decreases 3) Remains the same
8. Which are true of all alkenes?
1) They contain all single bonds and are saturated hydrocarbons
2) They contain one triple bond and are unsaturated hydrocarbons
3) They contain one double bond and are saturated hydrocarbons
1) C4H6 and C4H10 Teacher Preview Copy
4) They contain one double bond and are unsaturated hydrocarbons
9. Alkene hydrocarbons: Recognizing names and formulas of alkenes
1. Which two compounds belong to the alkene series of hydrocarbon?
1) Pentane and pentene 3) Propene and butene
2) Ethane and ethyne
4) Butene and propyne
2. Which set of IUPAC names are of compounds that are classified as alkenes?
1) Methyl and ethyl 3) Ethane and pentene
2) Ethene and decene 4) Ethyne and ethane
3. Which two formulas are of compounds belonging to the alkene series of hydrocarbons?
1) C2H4 and C11H22
3) C3H4 and C3H8
2) C2H6 and C3H4 4) C3H6 and C3H4
4. Which two formulas are of chemical substances belonging to the alkene homologous series?
2) C4H6 and C4H8 3) C6H10 and C7H14
4) C6H12 and C7H14
5. Which set of structural formulas correctly represents members of the alkene series?
1) 3)
2) 4)
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 293
