Question

Explain the following:
i) Hydroboration follows Markovnikov’s rule.
ii) Ozonolysis reaction gives the position of the double bond of the alkene.
iii) Alkynes are less
reactive than alkenes towards electrophilic addition reactions.
iv) Addition of HBr to propenenitrile does not follow Markownikoff’s rule.
v) Addition of HBr to conjugated diene gives 1,2 addition and 1,4 addition products.