Question:
On mixing a highly soluble impurity in water, the surface tension \(T\)
and angle of contact \(\theta\)
On mixing a highly soluble impurity in water, the surface tension \(T\)
and angle of contact \(\theta\)
Show Hint
Impurities can significantly alter surface properties of liquids.
Updated On: Mar 28, 2026
- decreases and increases respectively
- both increase
- both decrease
- increases and decreases respectively
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Effect on surface tension.
Adding a highly soluble impurity increases intermolecular attraction, thereby increasing surface tension.
Step 2: Effect on angle of contact.
With increased surface tension, the liquid tends to wet the surface less, causing an increase in angle of contact.
Step 3: Conclusion.
Both surface tension and angle of contact increase.
Adding a highly soluble impurity increases intermolecular attraction, thereby increasing surface tension.
Step 2: Effect on angle of contact.
With increased surface tension, the liquid tends to wet the surface less, causing an increase in angle of contact.
Step 3: Conclusion.
Both surface tension and angle of contact increase.
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