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  4. The rule which states that negative part of the addendum gets attached to that carbon atom which possesses less number of hydrogen atoms is called

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Q. The rule which states that negative part of the addendum gets attached to that carbon atom which possesses less number of hydrogen atoms is called

Hydrocarbons

Solution:

In the presence of peroxide, addition of $HBr$ to unsymmetrical alkenes like propene takes place contrary to the Markovnikov's rule. This happens only with $HBr$ but not with $HCl$ and $HI$. This reaction is known as peroxide or Kharash effect or anti-Markovnikov's rule. The reaction is shown below :

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