The principle of purification by soap relies on surface tension. Soap molecules disrupt surface tension, allowing them to surround and lift away dirt and oil from surfaces. This process enables effective cleaning by ensuring that contaminants are dispersed and washed ...
Category: Class 10 Science
NCERT Solutions for Class 10 Science and important questions for CBSE class 10 for session 2020-2021
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Oil spreads on the surface of water because the surface tension of oil is less than that of water. This causes oil molecules to spread out more easily, forming a thin layer on the water’s surface. This phenomenon occurs due ...
If the diameter of the capillary is doubled, the height of the water surface rising in it remains the same. This is because the height to which a liquid rises in a capillary tube is inversely proportional to the diameter ...
Astronauts cannot stand straight in space because there is no gravity. In the absence of gravitational pull, there is no force to hold them upright. Instead, they experience microgravity, causing them to float and requiring them to use restraints or ...
When soap is dissolved in water, the surface tension decreases. Soap molecules contain both hydrophilic and hydrophobic parts. The hydrophobic tails disrupt the cohesive forces between water molecules at the surface, reducing surface tension.