The correct decreasing order of reactivity of alkenes towards hydrogen halides is:
Correct answer: C. Propene>butene> pentene
- A. Pentene >butene>propene
- B. Butene>ethene>propyne
- C. Propene>butene> pentene
- D. None of these
Explanation
Reactivity of alkenes is inversely proportional to the no. of carbon atoms. As the no. of carbon atoms increases, reactivity of alkenes decreases. Reactivity of alkenes also decreases by substitution of H atom attached to C = C double bond.
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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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