Free Radical Substitution of Alkanes Quiz

What is the reason for the unreactivity of alkanes?

• They have weak bonds

• They are polar molecules

• They have high electronegativity

• They are non-polar molecules

What is a free radical?

• A molecule with a negative charge

• A molecule with a positive charge

• A molecule with a double bond

• A molecule with an unpaired electron

What type of reaction is the reaction between methane and bromine?

• Elimination reaction

• Substitution reaction

• Combustion reaction

• Addition reaction

What is the first stage of the reaction between methane and bromine called?

• Combustion

• Propagation

• Initiation

• Termination

What is the product of the reaction between a bromine free radical and a methane molecule?

• Hydrogen bromide

• Methyl free radical

• Bromomethane

• Ethane

What is the second step of the propagation stage in the reaction between methane and bromine?

• Formation of hydrogen bromide

• Formation of methyl free radical

• Formation of bromomethane

• Formation of ethane

What is the process called when a covalent bond splits to form free radicals?

• Ionic fission

• Homolytic fission

• Heterolytic fission

• Radical fission

What is the final stage of the reaction between methane and bromine called?

• Termination

• Initiation

• Combustion

• Propagation

What is the problem with free radical substitution of alkanes?

• Formation of only one product

• Formation of a range of side products

• Low reactivity

• No reaction occurs

Which exam boards do not require students to use curly half arrows when describing free radical substitution of alkanes?

• AQA, Edexcel, and OCR

• OCR and AQA

• AQA and Edexcel

• Edexcel and OCR