Question

In the presence of peroxide, HCl and HI do not give anti-Markovnikov's addition of alkenes because ______.

Options

• One of the steps is endothermic in HCl and HI

• Both HCI and HI are strong acids

• HCl is oxidizing and the HI is reducing

• All the steps are exothermic is HCl and HI

Answer 1

In the presence of peroxide, HCl and HI do not give anti-Markovnikov's addition of alkenes because one of the steps is endothermic in HCl and HI.

Explanation:

Anti-Markownikov addition is only possible in the presence of HBr and not in HCl or HI. In HBr, both the chain initiation and propagation processes are exothermic, whereas in HCl, the first step is exothermic, the second step is endothermic, and in HI, no step is exothermic.

As a result, HCl and HI do not undergo anti-Markovnikov's addition.