Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct
Answer
(1) Both Statement I and Statement II are correct
Solution
Statement I: b.p. n-pentane (309 K) > isopentane (301 K) > neopentane (282.5 K). Correct.
Statement II: With branching the molecule becomes nearly spherical, the surface area of contact decreases, van der Waals forces become weaker and the boiling point falls (NCERT). Correct, and it explains Statement I.
Answer: (1)