Worksheet: Properties of Alkenes

In this worksheet, we will practice writing and interpreting the names and formulas of alkenes and describing trends in properties, such as melting points.

Q1:

What is the name of the alkene with the molecular formula CH36?

  • APropane
  • BPropene
  • CButene
  • DEthene
  • EButane

Q2:

What is the name of the alkene with the molecular formula CH24?

  • AMethene
  • BPropene
  • CEthene
  • DEthane
  • EPropane

Q3:

What is the general formula for an alkene with a single carbon–carbon double bond?

  • ACH2n+2
  • BCH
  • CCH2+
  • DCH2
  • ECH2

Q4:

Which industrial process produces alkenes from long-chain alkanes?

  • ACatalytic cracking
  • BFractional distillation
  • CContact Process
  • DHaber Process
  • EWater-gas shift reaction

Q5:

Which of the following is the structural formula of an alkene?

  • A
    CHCHHCHHCHHCCHHHHH
  • B
    HCHHCCHHCHBrHHCl
  • C
    CHHHCHCHCHHHHH
  • D
    CHCHHHCHCCHCHHHH
  • E
    CCHHHCHOCHHHHHCHHH

Q6:

Which of the following is not a structural formula of an alkene?

  • A
    CHCHHH
  • B
    CHCHHHHCCCCHHHHHHH
  • C
    CHCHHCHHCHHH
  • D
    CHCHCHCHHCHCHHHHHH
  • E
    CHCHHCCCHCHHHHHH

Q7:

In which of the following phases can alkenes exist at room temperature?

  • ASolids and gases
  • BLiquids and gases
  • CSolids, liquids, and gases
  • DSolids and liquids

Q8:

Which of the following is not a property of ethene?

  • AFlammable
  • BColorless
  • CLiquid at room temperature
  • DSoluble in nonpolar solvents
  • EVolatile

Q9:

Which of the following statements describes why propene is unsaturated?

  • ASingle bonds exist between each of the carbon atoms.
  • BA double bond exists between two of the carbon atoms.
  • CEach hydrogen atom is connected to a carbon atom.
  • DPropene consists of carbon and hydrogen atoms.
  • EDouble bonds exist between each of the carbon atoms.

Q10:

Which of the following is not a use of alkenes?

  • AManufacturing plastics
  • BManufacturing rubber
  • CCracking
  • DProducing industrial chemicals
  • EBurning as a fuel

Q11:

Which of the following is not an alkene?

  • A
    CHCHCHCHHCCHHHHHHH
  • B
    CCHHHCHCHCHHCHHHHH
  • C
    CCHHCHCHHHHCHHH
  • D
    CCHHCHCHHHHH
  • E
    CClCCH3CH2ClH

Q12:

Which of the following molecules is but-2-ene?

  • A
    CHCHCHCHHHHH
  • B
    CHCHCHHHH
  • C
    CHCHHHHCHCCHHHH
  • D
    CCCHHHCHHH
  • E
    CHHHCHCHCHHH

Q13:

Which of the following molecules is but-1-ene?

  • A
    CHCHHHCHCHHHHH
  • B
    CCHHCHCHHHHH
  • C
    CH3CHCH3CH3
  • D
    CHHCHCHCHHHH
  • E
    CHCHHCCHHHHH

Q14:

An alkane has the structural formula shown:

CCCCCCCHHHHHHHHHHHHHHHH

In a cracking reaction, the alkane is converted to two molecules A and B. The molecular formula of A is CH48.

What is the name of the reacting alkane?

  • AHexene
  • BHexane
  • CHexyne
  • DHeptene
  • EHeptane

What is the name of A?

  • APropane
  • BPropene
  • CButene
  • DPentane
  • EButane

Which of the following is the most likely structural formula of A?

  • A
  • B
  • C
  • D
  • E

Which of the following is the most likely structural formula of B?

  • A
  • B
  • C
  • D
  • E

Q15:

Which of the following is the molecular formula of an alkene containing one carbon–carbon double bond and three carbon atoms?

  • ACH35
  • BCH36
  • CCH38
  • DCH34
  • ECH37

Q16:

Which of the following alkenes has the lowest melting point?

  • APentene
  • BHexene
  • CButene
  • DPropene
  • EHeptene

Q17:

Which of the following alkenes is a gas at room temperature?

  • ACH816
  • BCH612
  • CCH24
  • DCH510
  • ECH714

Q18:

What is the number of carbon atoms in an alkene containing one carbon–carbon double bond and 6 hydrogen atoms?

  • A2
  • B6
  • C5
  • D3
  • E4

Q19:

Which of the following alkenes has the highest density?

  • AButene
  • BPropene
  • CHexene
  • DEthene
  • EPentene

Q20:

Which of the following alkenes has the lowest boiling point?

  • AHexene
  • BPentene
  • CPropene
  • DButene
  • EEthene

Q21:

Which of the following alkenes has the highest viscosity?

  • APentene
  • BEthene
  • CButene
  • DHexene
  • EPropene

Q22:

Which of the following is the condensed formula of an alkene that has the molecular formula CH612?

  • ACHCH(CH)CH233
  • BCHCH(CH)CH2233
  • CCHCHCH(CH)CH3233
  • DCHCHC(CH)CH3223
  • ECHCH(CH)CH2223

Q23:

Which of the following alkenes is the least volatile?

  • AButene
  • BEthene
  • CPropene
  • DPentene
  • EHexene

Q24:

What is the general formula for the group of the compounds to which the following displayed formula is related?

CHHHCCHHHCHCHCHHHH
  • ACHnn2
  • BCH222n
  • CCH22n
  • DCHnn2+2
  • ECHnn

Q25:

Fill in the blank: The number of carbon atoms in an alkene containing 10 hydrogen atoms is .

  • A20 carbon atoms
  • B4 carbon atoms
  • C5 carbon atoms
  • D6 carbon atoms
  • E10 carbon atoms

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