Discuss the free radical mechanism of addition of HBr to propene.
Or
Give the mechanism of addition of HBr to propylene in the presence of peroxide.

The addition of HBr to propene yields 2-broniopropane, while in the presence of benzoyl peroxide, the same reaction yields 1-bromopropane. Explain and give mechanism. 

Why peroxide effect is shown only by HBr and not by HCl or HI?
Or
Explain why Kharasch effect is shown by HBr only and not by HCl or HI.

How do alkenes react with sulphuric acid? Discuss its mechanism.

Write a short note on hydroboration oxidation.

What is ozonolysis? What is its significance?

Write IUPAC names of the products obtained by the ozonolysis of the following compounds:
Pent - 2-ene 

160.

Write IUPAC names of the products obtained by the ozonolysis of the following compounds:
 3, 4-Dimethlhept-3-ene