Previous year MCQs

General science UPPSC 1994 GS-I
Question

Oil spreads over the surface of water because:

Answer & Solution

Answer: (Detailed Solution Below)

Option D: Oil has less surface tension than water

Detailed Solution:

The correct answer is “Oil has less surface tension than water”.
Oil spreads over the surface of water because it has a lower surface tension compared to water. This difference in surface tension causes the oil to spread out to minimize the surface energy.

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