Mechanical Properties of Fluids

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below :

1. Statement I is correct but statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Both Statement I and Statement II are incorrect
4. Both Statement I and Statement II are correct

Answer

(2) Statement I is incorrect but Statement II is correct

Solution

air 1.8 10-5 Pa s water 1.0 10-3 Pa s

intermolecular forces in gases are much weaker Statement I is incorrect.

Insoluble impurities (oil, grease) spread on the surface and weaken the cohesive pull surface tension decreases Statement II is correct.

Answer: (2)