Alkene Basics
Nomenclature
Structural Isomers
Reactivity
Physical Properties
100

 What is the general formula for alkenes?

What is CₙH₂ₙ?

100

What suffix is used in the IUPAC naming of alkenes?

What is “-ene”?

100

What are structural isomers?

What are compounds with the same molecular formula but different structural arrangements?

100

Are alkenes more or less reactive than alkanes?

What is more reactive?

100

Are alkenes typically gases or liquids at room temperature?

What is gases (for lower alkenes) and liquids (for higher alkenes)?

200

Alkenes are classified as what type of hydrocarbons?

What are unsaturated hydrocarbons?

200

 In naming alkenes, how is the position of the double bond indicated?

What is by numbering the carbon chain to give the double bond the lowest possible number?

200

How many structural isomers exist for C₄H₈ alkenes?

What are four?

200

What type of reaction do alkenes commonly undergo?

What is addition reactions?

200

 Are alkenes soluble in water?

What is no, they are nonpolar and insoluble in water?

300

What type of bond is characteristic of alkenes?

What is a carbon-carbon double bond?

300

Name the compound CH₂=CH–CH₃.

What is propene?

300

What type of isomerism is exhibited by 1-butene and 2-butene?

 What is positional isomerism?

300

What is the product when ethene reacts with hydrogen gas?

What is ethane?

300

How does the boiling point of alkenes compare to alkanes of similar molecular weight?

What is slightly lower due to the presence of the double bond?

400

What is the simplest alkene?

What is ethene?

400

Name the compound CH₃–CH=CH–CH₃.

What is 2-butene?

400

 What type of isomerism is shown by cis-2-butene and trans-2-butene?

What is geometric (cis-trans) isomerism?

400

What is the product when ethene reacts with bromine?

What is 1,2-dibromoethane?

400

 What is the density of alkenes compared to water?

What is less dense; they float on water?

500

How does the presence of a double bond affect the shape of an alkene molecule?

What is it creates a planar region around the double bond due to restricted rotation?

500

What is the IUPAC name for CH₂=CH–CH₂–CH₃?

What is 1-butene?

500

Why do geometric isomers occur in alkenes?

What is due to restricted rotation around the double bond?

500

What is the term for the reaction where alkenes react with water in the presence of an acid catalyst?

What is hydration?

500

 Do alkenes have higher or lower melting points compared to alkanes?

What is generally lower?