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Given below are two statements : Statement I : Hot water flows faster than cold water. Statement II : Soap water has a higher surface tension as compared to fresh water. In the light of the above statements, choose the correct answer from the options given below.

Asked in JEE Main 23rd Jan 1st Shift 2025 · Concept and assertion

• (1) Both statement I and statement II are false
• (2) Statement I is false but statement II is true
• (3) Both statement I and statement II are true
• (4) Statement I is true but statement II is false

Step-by-step solution

Why the other options are wrong

• (1) comes from calls Statement I false as well; the viscosity of a liquid falls as it is heated, so hot water offers less internal resistance and does flow faster.
• (2) comes from reverses both statements; soap is a surfactant, and a surfactant works by lowering the surface tension of water, not raising it.
• (3) comes from accepts Statement II, usually from the everyday sight of soap water making large films and bubbles; films are easy to stretch precisely because the surface tension is low.

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