Chemistry · Thermodynamics & Thermochemistry
JEE Main 2025 — 3 April, Evening Shift — Question 3
Given below are two statements : one is labelled as Statement I and the other is labelled as Statement II:
Statement I: When a system containing ice in equilibrium with water (liquid) is heated, heat is absorbed by the system and there is no change in the temperature of the system until whole ice gets melted.
Statement II: At melting point of ice, there is absorption of heat in order to overcome intermolecular forces of attraction within the molecules of water in ice and kinetic energy of molecules is not increased at melting point.
In the light of the above statements, choose the correct answer from the options given below :
- Option A:Correct
Both Statement I and Statement II are true
- Option B:
Statement I is true but Statement II is false
- Option C:
Both Statement I and Statement II is false
- Option D:
Statement I is false but Statement II is true
Answer: A
Step-by-step solution
In phase transition, heat provided is used to change solid ice to liquid water at constant
temperature, hence there is no change in temperature and kinetic energy.
Answer key and solution verified before publishing.
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- Exam
- JEE Main 2025
- Subject
- Chemistry
- Chapter
- Thermodynamics & Thermochemistry
- Topic
- Internal Energy and the First Law