Which of the following statements is NOT correct about surface tension?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. At room temperature, surface tension of water is less than ethyl alcohol.
The statement that is NOT correct about surface tension is:
"At room temperature, surface tension of water is less than ethyl alcohol."
In reality, the surface tension of water is greater than that of ethyl alcohol at room temperature. Water has a higher surface tension due to stronger cohesive forces between its molecules compared to ethyl alcohol. Surface tension is measured in dynes/cm, and the shape of a water drop is spherical due to these cohesive forces.