Both statement I and statement II are correct. Boiling point of n-pentane =309 K isopentane =301 K neopentane =282.5 As branching increases molecules attain the shape of a sphere results in smaller area of contact thus weak intermolecular forces between spherical molecules, which are overcome at relatively lower temperature. Leading to decrease in boiling point.
Given below are two statements: Statement I : The boiling point of three isomeric pentanes follows the order n-pentane gt isopentane gt neopentane…
NEET UG 2024 — Chemistry Organic Chemistry
2024mcqeasy
Given below are two statements: Statement I : The boiling point of three isomeric pentanes follows the order n-pentane > isopentane > neopentane Statement II : When branching increases, the molecule attains a shape of sphere. This results in smaller surface area for contact, due to which the intermolecular forces between the spherical molecules are weak, thereby lowering the boiling point. In the light of the above statements, choose the most appropriate answer from the options given below:
Official previous-year question
Held on 30 Apr 2024 · Verified 9 Jul 2026.
Options
- A
Both Statement I and Statement II are incorrect
- B
Statement I is correct but Statement II is incorrect
- C
Statement I is incorrect but Statement II is correct
- D
Both Statement I and Statement II are correct
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