The most reactive hydrocarbon is:
Correct answer: A. Ethene
- A. Ethene
- B. Acetylene
- C. Heptane
- D. Ethane
Explanation
In the formation of a p-bond, the partially filled p-orbitals overlap in a parallel fashion. The probability of finding electron is thus away from the line joining the two nuclei. Due to this reason p-electrons are less firmly held between the nuclei. A p-bond is, therefore, a weak bond as compared to a s-bond. During a reaction it breaks comparatively easily rendering alkenes as reactive group of compounds. Moreover, the loosely held p-electrons are more exposed to attack by the electrophilic reagents. Alkenes, therefore, undergo electrophilic reactions very easilyOrder of Reactivity:Alkenes>Alkynes>Alkanes
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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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