Скачать или смотреть Given below are two statements: Statement-I : The hot water flows faster than cold water. Statement

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) Statement-I is false but Statement II is true
(2) Statement-I is true but Statement II is false
(3) Both Statement-I and Statement-II are true
(4) Both Statement-I and Statement-II are false
🔥 JEE Mains 2025 Physics Solution | Fluid Mechanics & Surface Tension Concept 🚀

In this detailed explanation, we will analyze the given statements based on the concepts of *fluid mechanics* and *surface tension* to determine which one is correct. This question tests your understanding of how *temperature affects viscosity* and how *soap water behaves in comparison to fresh water* in terms of **surface tension**.

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📌 Understanding the Statements

✅ *Statement-I: The hot water flows faster than cold water.*
🔍 This statement relates to the *viscosity of fluids**. Viscosity is the internal resistance of a liquid to flow. The viscosity of water **decreases with an increase in temperature**, meaning **hot water has lower viscosity* compared to cold water. Since viscosity resists motion, a lower viscosity allows the liquid to flow more easily.

🔹 **Scientific Explanation**:
The *kinetic energy* of water molecules increases with temperature.
The *intermolecular forces* become weaker, reducing internal friction.
As a result, the *fluid flows faster* at higher temperatures.

🔬 **Real-Life Example**:
Cooking oil flows *more easily* when heated.
Honey becomes *less thick* when warmed up.

*Thus, Statement-I is TRUE ✅.*

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✅ *Statement-II: Soap water has higher surface tension as compared to fresh water.*
🔍 This statement is based on the concept of **surface tension**, which is caused by cohesive forces between molecules.

🔹 **Scientific Explanation**:
*Fresh water* has a relatively *high surface tension* due to strong hydrogen bonding between water molecules.
*Soap water* contains surfactant molecules that **disrupt hydrogen bonds**, reducing surface tension.
The presence of soap molecules reduces the *cohesion* of water molecules, making the water **spread out more easily**.

🔬 **Real-Life Example**:
Water droplets form a *spherical shape* on a surface due to high surface tension.
Soap bubbles expand easily because of the reduced surface tension of soap water.

*Thus, Statement-II is FALSE ❌.*

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📌 Conclusion – Which Option is Correct?

From our analysis:
*Statement-I is TRUE* ✅ (Hot water flows faster due to lower viscosity).
*Statement-II is FALSE* ❌ (Soap water has *lower* surface tension than fresh water).

📌 *Correct Answer:* *(2) Statement-I is true but Statement-II is false* ✅

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📚 JEE Mains 2025 Physics Preparation – Important Concepts Covered

This problem is based on:
✔️ *Viscosity and Temperature Relationship*
✔️ *Surface Tension and Effect of Surfactants*
✔️ *Fluid Dynamics and Real-Life Applications*
✔️ *Fundamental Principles of Physics for Competitive Exams*

Understanding these concepts will *not only help you in JEE Mains* but also in *NEET, JEE Advanced, and other competitive exams* where fluid mechanics and surface tension are frequently tested.

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🔥 Key Takeaways for JEE Mains 2025 Aspirants 🚀

📌 *1. Higher Temperature → Lower Viscosity → Faster Flow*
📌 *2. Soap Reduces Surface Tension → Helps in Cleaning Action*
📌 *3. Always Relate Physics Concepts to Daily Life for Better Understanding*

By mastering these fundamental concepts, you will be able to tackle similar problems with confidence in your **JEE Mains and NEET exams**. Keep practicing and keep learning! 💪✨

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