When an unsymmetrical alkene undergoes addition reactions, the negative part of attacking reagent is added to that double-bonded carbon atom which contains:
Correct answer: B. Lesser number of hydrogen atoms
- A. Highest number of chloride atoms
- B. Lesser number of hydrogen atoms
- C. Highest number of hydrogen atoms
- D. Moderate number of hydrogen atoms
- E. Lesser number of chloride atoms
Explanation
This is based on Markovnikov's Rule, which states that in the addition of a protic acid (such as HCl, HBr, etc.) to an unsymmetrical alkene, the hydrogen atom (the positive part of the reagent) attaches to the carbon with the greater number of hydrogen atoms, and the negative part (such as Cl⁻, Br⁻, etc.) attaches to the carbon with the fewer hydrogen atoms.
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About Chemistry of Hydrocarbons
Hydrocarbons are studied through the structures and reactions of alkanes, alkenes, alkynes and aromatic compounds. Coverage includes free radical substitution in alkanes, electrophilic addition to carbon-carbon multiple bonds, benzene substitution, aromatic stability and the difference between addition reactions of alkenes and substitution reactions of benzene.
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