Worksheet: Hydrocarbons

In this worksheet, we will practice identifying and naming simple hydrocarbons and representing them using different types of formulas.

Q1:

Nonane, CH920, is a hydrocarbon found in JP-8, a type of jet fuel. Why is nonane a hydrocarbon?

  • AIt contains hydrogen and carbon in the correct ratio.
  • BIt is made from crude oil.
  • CIt contains hydrogen and carbon.
  • DIt contains only hydrogen and carbon.
  • EIt can be used as a fuel.

Q2:

Complete the alkanes in the correct order: , ethane, , butane, pentane, , heptane.

  • AMethane, hexane, propane
  • BPropane, methane, hexane
  • CMethane, propane, hexane
  • DHexane, methane, propane
  • EPropane, hexane, methane

Q3:

Which combination of elements are hydrocarbons made from?

  • AHydrogen, carbon, oxygen, and nitrogen
  • BHydrogen, carbon, and nitrogen
  • COxygen and carbon
  • DHydrogen, carbon, and oxygen
  • ECarbon and hydrogen

Q4:

The diagram shows a common hydrocarbon.

CHHCHHHCCHHHHH

What is the molecular formula of this hydrocarbon?

  • AH(CH)H24
  • BCHCH2525
  • CHCHCHCHCHH2222
  • DCHCHCHCH3223
  • ECH48

Q5:

Which type of formula is used to represent the molecule in this diagram?

CHHCHHHH
  • ACondensed
  • BEmpirical
  • CStructural
  • DMolecular
  • EDisplayed

Q6:

What is the molecular formula of butane?

  • A
    CHHHCHCHHHCHHH
  • BCH38
  • C
    CHHCHCHHHHH
  • DCH410
  • ECHCHCH323

Q7:

What is the structural formula of propane?

  • A
    CHHCHHCHCHHHHH
  • BCH410
  • CCH38
  • D
    CHCHHCHHHHH
  • ECHCHCH323

Q8:

Which of the following diagrams shows a molecule of ethane?

  • A
    CCHHHHHCCHHHHCHHH
  • B
    CHHCHHCHHHH
  • C
    CHHHCHHCHHCHHH
  • D
    CHHHH
  • E
    CHHHCHHH

Q9:

What is the displayed formula for heptane?

  • A
    CHCHHCHHHCHHHCHHCCHHHHCHHH
  • BCH714
  • CCH818
  • DCHCHCHCHCHCHCH3222223
  • E
    CCHHHHCHHCHHCHCHHHCHHHH

Q10:

Which of the following diagrams shows a molecule of pentane?

  • A
    CHHCHCHHHHH
  • B
    CHCHHHHCHHCHHH
  • C
    CHCHHHCHHCHHCHHHH
  • D
    CHHHH
  • E
    CCHHHHHH

Q11:

Which type of bond joins the atoms in hydrocarbon molecules together?

  • APolar
  • BHydrogen
  • CMetallic
  • DCovalent
  • EIonic

Q12:

If we have a molecular formula CH4 for a specific compound, which class will this compound be related to?

  • AAlkenes
  • BAlkanes
  • CAlkynes
  • DCycloalkanes

Q13:

Fill in the blank: The number of hydrogen atoms in an alkane containing 2 carbon atoms is .

  • A10 hydrogen atoms
  • B8 hydrogen atoms
  • C4 hydrogen atoms
  • D2 hydrogen atoms
  • E6 hydrogen atoms

Q14:

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

CHHHCHCHCCHHCHHH

  • ACHnn2
  • BCHnn
  • CCH22n
  • DCHnn22
  • ECHnn2+2

Q15:

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

CCHHCHCHHCHHCHHHCHHCHHCCHHHHHH
  • ACHnn2+2
  • BCHnn22
  • CCH22n
  • DCHnn2
  • ECHnn

Q16:

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

Q17:

Determine whether the compound CH(CH)CH3223 has a displayed, molecular, condensed, skeletal, or structural formula.

  • AStructural formula
  • BDisplayed formula
  • CCondensed formula
  • DSkeletal formula
  • EMolecular formula

Q18:

Fill in the blank: The number of carbon atoms in a cycloalkane containing 24 hydrogen atoms is .

  • A24 carbon atoms
  • B13 carbon atoms
  • C11 carbon atoms
  • D12 carbon atoms
  • E48 carbon atoms

Q19:

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

CHHHCCHHHHH
  • ACHnn
  • BCHnn2+2
  • CCH22n
  • DCHnn2
  • ECHnn22

Q20:

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

Q21:

If 𝑛 indicates the number of carbon atoms in an alkyne, which of the following indicates the number of hydrogen atoms when 𝑛=2?

  • A4 hydrogen atoms
  • B5 hydrogen atoms
  • C2 hydrogen atoms
  • D8 hydrogen atoms
  • E6 hydrogen atoms

Q22:

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

CH31C2C3CH34
  • ACHnn2
  • BCH22n
  • CCHnn2+2
  • DCHnn
  • ECHnn22

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