Quiz on Hydrocarbons: Alkanes, Alkenes, and Alkynes

What are hydrocarbons primarily composed of?

• Hydrogen and nitrogen

• Carbon and hydrogen

• Carbon and oxygen

• Carbon, hydrogen, and sulfur

What is the general formula for alkanes?

• CnH2n

• CnH2n-2

• CnH2n+2

• CnH2n+1

Which of the following is a method for preparing alkanes?

• Dehydration of alcohols

• Hydrogenation of alkenes

• Addition of halogens

• Electrophilic addition

What type of isomerism occurs when compounds have the same molecular formula but different carbon skeletons?

• Geometric isomerism

• Chain isomerism

• Position isomerism

• Functional isomerism

Which reaction is known as Wurtz reaction?

• Formation of alkenes from alkyl halides

• Dehydrohalogenation of alkyl halides

• Formation of alkanes from alkyl halides

• Hydrogenation of alkenes

What is the primary characteristic of alkenes?

• They are aromatic compounds

• They contain only single bonds

• They contain at least one double bond

• They are saturated hydrocarbons

Which of the following compounds is an example of an alkene?

• C2H6

• C3H8

• C4H8

• C5H12

What is the effect of increasing the number of carbon atoms on the number of structural isomers?

• It has no effect on isomers

• It decreases the number of isomers

• It increases the number of isomers

• It makes isomers impossible

What type of reaction do alkenes primarily undergo?

• Redox reactions

• Addition reactions

• Substitution reactions

• Elimination reactions

Which of the following is a property of alkynes?

• They contain at least one triple bond

• They are less reactive than alkenes

• They have a general formula of CnH2n

• They are saturated hydrocarbons