Free Radical Halogenation Quiz

What makes bromination more selective than chlorination in free radical halogenation?

• Bromination has a higher activation energy.

• Bromination is less exothermic.

• Bromination has a lower activation energy.

• Bromination forms more stable radicals.

In the mechanism of free radical halogenation, what is the role of the propagation steps?

• To terminate the reaction.

• To increase the concentration of radicals.

• To form the product repeatedly.

• To initiate the reaction.

What is required to initiate the free radical halogenation reaction?

• A low temperature environment.

• A large amount of Cl2.

• A source of energy like light or heat.

• A high concentration of radicals.

What is the main difference between the initiation and propagation steps?

• Both steps use radicals.

• Both steps form radicals.

• Propagation forms radicals, initiation uses them.

• Initiation forms radicals, propagation uses them.

In the context of free radical halogenation, what is the significance of using light?

• It cools down the reaction.

• It provides energy to break bonds.

• It increases the concentration of Cl2.

• It decreases the reaction rate.

What happens during a termination step in a radical reaction?

• Radicals are consumed.

• Radicals are formed.

• The reaction is propagated.

• The reaction is initiated.

Which of the following is a characteristic of termination steps?

• They increase the number of radicals.

• They decrease the number of radicals.

• They have no effect on radicals.

• They only occur in chlorination.

What is the result of a termination step in a radical reaction?

• Decrease in product formation.

• Increase in reaction rate.

• Consumption of existing radicals.

• Formation of new radicals.

Why is bromination more selective than chlorination?

• Bromination is less selective.

• Bromination is faster.

• Bromination forms less stable radicals.

• Bromination has a higher activation energy.

How does the bond strength of HBr compare to HCl in the context of bromination?

• HBr does not form in bromination.

• HBr and HCl have the same strength.

• HBr is weaker than HCl.

• HBr is stronger than HCl.