Radical Halogenation of Alkanes

Which of the following is not true of free-radical halogenation reactions? 

• Fluorine is more reactive than chlorine in these reactions. 
• Bromine is more selective than chlorine. 
• The reactions require either light or high temperatures to proceed. 
• Brominations are faster than chlorinations. 

Tags

NGSS.HS-PS1-5

Which, if any, of the following would you choose to accomplish the reaction shown above in the best yield? 

• F₂, light 
• Cl₂, light 
• Br₂, light
• I₂, light

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which is most true about the function of a catalyst? 

• Catalysts speed up the reaction by lowering the transition state of a reaction. 
• Catalysts usually need higher temperatures to promote reactions. 
• Catalysts lower the energies of the reactants. 
• Catalysts lower the energies of the products. 

Tags

NGSS.HS-PS1-5