Worksheet: Addition Reactions of Alkenes

In this worksheet, we will practice defining addition reactions and writing equations for the addition of water, hydrogen, and halogens to alkenes.

Q1:

What is an addition reaction?

  • AA reaction in which parts of one molecule swap with parts of another
  • BA reaction in which two reactants combine to form a larger molecule and water or another small molecule is released
  • CA reaction in which two reactants combine to form a larger molecule without by-products
  • DA reaction in which a catalyst is added
  • EA reaction in which the reactants are added in sequence

Q2:

Alkenes can undergo addition reactions with halogens such as chlorine or bromine. What type of organic compound is produced?

  • AAlkene
  • BAlkyne
  • CCarbonyl
  • DHaloalkane
  • EAlcohol

Q3:

What type of organic compound is produced by the addition reaction of an alkene with steam?

  • AAlkene
  • BAlkyne
  • CAlkane
  • DCarbonyl
  • EAlcohol

Q4:

An addition reaction is described by the equation:

+XCHCHHHOH2

What is the structural formula of the product X?

  • A
  • B
  • C
  • D
  • E

What is the name of the product X?

  • AEthane-1,2-diol
  • BEthanol
  • CEthyne
  • DPropane
  • EDiethyl ether

Q5:

An addition reaction is described by the equation:

+XCCHHHHClCl

What is the structural formula of the product X?

  • A
  • B
  • C
  • D
  • E

Q6:

Consider the incomplete reaction equation:

What is the missing reactant in this equation?

  • AHBr
  • BBr2
  • CCl
  • DBr
  • ECl2

Q7:

If sufficient propene is added to bromine water and the mixture is shaken, the bromine water decolorizes, losing its distinctive orange color as illustrated.

What is the name of the product of this reaction?

  • APropan-1-ol
  • B1-Bromopropane
  • C1,1-Dibromopropane
  • DPropan-2-ol
  • E1,2-Dibromopropane

Q8:

Alkenes can undergo addition reactions with hydrogen to produce less-saturated hydrocarbons. What is the name of this process?

  • AHydrogenation
  • BHydrogen elimination
  • CHydrogen insertion
  • DHydroaddition
  • EHydrolysis

Q9:

But-1-ene is an alkene with the following structure.

What is the structure of the product of the addition reaction between but-1-ene and hydrogen?

  • A
  • B
  • C
  • D
  • E

Q10:

Propene is an alkene with the following structure.

What is the name of the product of the addition reaction between propene and hydrogen?

  • APropyne
  • BPropylene
  • CPropene
  • DPropane
  • EHydrogen propene

Q11:

Which of the following statements about hydroboration reactions of alkenes is false?

  • AThe reaction is a one-step reaction.
  • BThe reaction proceeds in an anti-Markovnikov mechanism.
  • CIt occurs via a carbocation intermediate.
  • DThe geometry of the reaction is syn.
  • EIt takes place with retention of configuration.

Q12:

Which of the following types of products are formed from alkenes?

  • AGlass
  • BSalts
  • CPlastics
  • DCardboard
  • EProteins

Q13:

Which of the following compounds is often used as a fuel?

  • APolyvinyl chloride
  • BEthanoic acid
  • CDodecane
  • DPropene
  • EDibromoethane

Q14:

Hydrocarbons X and Y are produced by cracking decane (CH)1022. The molecular formula of X is CH612.

What is the molecular formula of Y?

  • ACH48
  • BCH614
  • CCH610
  • DCH410
  • ECH510

Which diagram illustrates the appearance of a glowing splint after exposure to the vapor of compound X in air?

  • A
  • B
  • C
  • D
  • E

Which diagram illustrates a test tube of bromine water after the addition of a large quantity of compound X?

  • A
  • B
  • C
  • D
  • E

Which diagram illustrates a test tube of potassium permanganate solution after the addition of a large quantity of compound Y?

  • A
  • B
  • C
  • D
  • E

Q15:

An alkane undergoes three different cracking reactions to produce a range of compounds, as shown by the equations.

At room temperature and pressure, compounds W, Y, and Z are gases and compound X is a liquid. The results of testing the compounds with bromine water are shown in the diagram.

Br2(aq)XZWYXZWY

What is the displayed formula of compound W?

  • A
  • B
  • C
  • D
    CHCHCHHHCHHH
  • E

What is the displayed formula of compound X?

  • A
  • B
  • C
  • D
  • E

What is the displayed formula of compound Y?

  • A
  • B
  • C
  • D
  • E

What is the displayed formula of compound Z?

  • A
  • B
  • C
  • D
  • E

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