The boiling and melting points of alkynes -------- as their molecular structure becomes more complex.
Correct answer: A. Increases
- A. Increases
- B. Decreases
- C. Remain constant
- D. Fluctuate
Explanation
When the molecular structure of alkynes becomes more complex, the molecular weight increases, leading to stronger London dispersion forces. This requires more energy to overcome these forces, resulting in an increase in the melting and boiling points of alkynes. Options B, C, and D are incorrect as they do not consider the relationship between molecular complexity and boiling/melting points correctly.
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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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