Reply To Mark's Question: Why must we have UV light for free radical substitution.
My reply: Firstly to have chlorine radical, i need to get it from chlorine molecule.... So, I need a minimum energy to break up my chlorine molecule to get chlorine radical.... ms pang :)
When I was in uni, i was amazed by the availability of an interactive forum where students were encouraged to post questions. This allows students to have a data-bank of all the questions & answers!
Some questions asked by students were very intriguing that I had never thought of. When I read their questions, I realised that I knew too little of the subject and that was why I was unable to ask those questions!
Hope that the questions posted by your fellow classmates can help you understand the topics better as well as add value to your answering techniques!