Chemistry Quiz on Alkanes

What is the general formula for alkanes?

• CnH2n+2

• CnH2n

• CnHn+2

• CnHn

Which of the following best describes alkanes?

• Unsaturated hydrocarbons

• Saturated hydrocarbons

• Aromatic hydrocarbons

• Polar hydrocarbons

What causes the variation in boiling points among alkanes?

• Ionic bonding

• Covalent bonding

• Hydrogen bonding

• van der Waals' forces

What is produced during the incomplete combustion of alkanes?

• Only water and carbon dioxide

• Carbon monoxide and water

• Only carbon dioxide

• Only water

How does a catalytic converter reduce the environmental impact of combustion in vehicles?

• By increasing fuel efficiency

• By converting pollutants into less harmful substances

• By filtering out carbon particles

• By reducing the engine's temperature

Which type of reaction involves chlorine and bromine with alkanes?

• Addition reactions

• Elimination reactions

• Substitution reactions

• Oxidation reactions

What term describes the breaking of a chemical bond where each of the fragments retains one of the originally bonded electrons?

• Radical

• Homolytic fission

• Heterolytic fission

• Substitution

Which of the following is NOT a step in the radical substitution mechanism for alkanes?

• Initiation

• Propagation

• Termination

• Condensation

The diagram shows the structural formulas for Propane, Pentane, and Heptane, as well as a shape labeled "Windowpane."

What does the term "aliphatic" refer to in organic chemistry?

• Compounds containing a ring structure

• Organic molecules with straight or branched chains

• Substances that are saturated with oxygen

• Elements that contain only nitrogen and carbon