JEE Main 2025 Jan 23 Shift 1, Physics Q3: Properties of Fluids
Given below are two statements:
Statement-I : The hot water flows faster than cold water.
Statement-II : Soap water has higher surface tension as compared to fresh water.
In the light above statements, choose the correct answer from the options given below
- A
Statement-I is false but Statement II is true
- B
Statement-I is true but Statement II is false
- C
Both Statement-I and Statement-II are true
- D
Both Statement-I and Statement-II are false
Statement I: Viscosity of water falls as its temperature rises, so hot water encounters less internal friction and flows more readily than cold water. True.
Statement II: Soap (a surfactant) preferentially occupies the air-water interface and reduces the cohesive pull at the surface, thereby lowering the surface tension of water. So soap water has lower surface tension than fresh water, not higher. False.
Statement I is true; Statement II is false.
Concept behind this question
Properties of FluidsNotes, formulas and examples →More previous year questions on Properties of Fluids
Practice more Physics
Concept-wise practice with instant solutions on Fundamenthol.
Start practicing →