MHT CET · Chemistry · Hydrocarbons

Which from following has highest boiling point?

A 2-methoxy propane
B n-butane
C 2-methylbutane
D n-pentane

Verified Solution

Answer & Solution

Correct Answer

(D) n-pentane

Step-by-step Solution

Detailed explanation

Boiling point increases with the number of carbon atoms and decreases with an increase in branching of alkanes.
n-pentane, having five carbon atoms in a straight chain, shows the highest boiling point.
Thinking Hatke - Q. 43
Ethers of comparable masses have higher boiling points than their corresponding alkanes due to weak dipole-dipole interactions.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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