- Exam
- JEE Main
- Year
- 2024
- Date
- 27 January
- Shift
- Morning Shift
- Subject
- Physics
- Chapter
- Mechanical Properties of Fluids
JEE Main 2024 · 27 January · Morning Shift · Physics · Mechanical Properties of Fluids
Given below are two statements : Statement (I) : Viscosity of gases...
Given below are two statements :
Statement (I) : Viscosity of gases is greater than that of liquids.
Statement (II) : Surface tension of a liquid decreases due to the presence of insoluble impurities.
In the light of the above statements, choose the most appropriate answer from the options given below :
Options
- AStatement I is correct but statement II is incorrect
- BStatement I is incorrect but Statement II is correct
- CBoth Statement I and Statement II are incorrect
- DBoth Statement I and Statement II are correct
Correct answer
B. Statement I is incorrect but Statement II is correct
Step-by-step solution
Viscosity is a measure of a fluid's resistance to flow, and gases typically have lower molecular interactions and are less dense than liquids, resulting in lower viscosity.
The presence of insoluble impurities in a liquid can decrease its surface tension. Surface tension is related to the cohesive forces between molecules at the surface of a liquid. Insoluble impurities can disrupt these cohesive forces, leading to a decrease in surface tension.
Hence, this is the correct option.