Which of the following isomer of pentane have least melting and boiling points?
Correct answer: C. neo-pentane
- A. n-pentane
- B. iso-pentane
- C. neo-pentane
- D. 2-methyl butane
Explanation
Neo-pentane (also known as 2,2-dimethylpropane) has the least melting and boiling points. Neo-pentane has a highly branched structure with three methyl groups attached to a central carbon atom. This branching reduces the surface area available for intermolecular interactions, leading to weaker intermolecular forces such as London dispersion forces. Weaker intermolecular forces result in lower melting and boiling points.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Practise Chemistry of Hydrocarbons
1,093 free Chemistry of Hydrocarbons MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Chemistry of Hydrocarbons questions
IUPAC name of the following compound is CH3-(CH2)3-C(CH3)3?
Michael Faraday discovered benzene in the gas formed from?
What is the correct order of reactivity towards nucleophilic addition?
The resonance hybrid structure of benzene is _ kJ/mol more stable than the hypothetical 1,3,5-cyclohexatriene.
Which statement about tautomerism is correct?
The density of benzene is: