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Properties of Matter question

2025 · 23 Jan · Shift 1 · Q51
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Properties of Matter question

2025 · 23 Jan · Shift 1 · Q51

JEE MainPhysicsProperties of MatterMCQ+4 / −1
Given below are two statements: Statement I: The hot water flows faster than cold water Statement II: Soap water has higher surface tension as compared to fresh water. In the light above statements, choose the correct answer from the options given below
  1. A
    Both Statement I and Statement II are false
  2. B
    Both Statement I and Statement II are true
  3. C
    Statement I is false but Statement II is true
  4. D
    Statement I is true but Statement II is false
View written solutionFree

Correct answer: D

  1. Analyze Statement I: "The hot water flows faster than cold water."

    Flow behavior depends strongly on viscosity.

    • For liquids, viscosity decreases as temperature increases.
    • Hence, hot water has lower viscosity than cold water.
    • A liquid with lower viscosity offers less internal resistance to flow, so it flows more easily/faster.

    Therefore, Statement I is true.

  2. Analyze Statement II: "Soap water has higher surface tension as compared to fresh water."

    • Soap is a surface-active agent (surfactant).
    • Surfactants reduce the surface tension of water.
    • Therefore, soap water has lower surface tension than fresh water, not higher.

    Therefore, Statement II is false.

  3. Match with the options:

    • A: Both false →\rightarrow→ incorrect
    • B: Both true →\rightarrow→ incorrect
    • C: I false, II true →\rightarrow→ incorrect
    • D: I true, II false →\rightarrow→ correct

  4. Final Answer:

    The correct option is D.

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