Question : The surface tension of water on adding detergent to it:
Option 1: increases
Option 2: decreases
Option 3: no change
Option 4: becomes zero
Correct Answer: decreases
Solution : The correct option is decreases.
When detergent is added to water, it reduces the surface tension of the water. Surface tension is the property of a liquid that allows it to resist an external force due to the cohesive nature of its molecules. In the case of water, this is due to the hydrogen bonding between water molecules.
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