NEET Physics: Mechanical Properties of Fluids — MCQ Test 19

Q6. What causes the height of capillary rise to be inversely proportional to the tube’s radius?

Q7. Why does blowing over a piece of paper lift it upwards?

Q8. Why does a fluid’s flow transition from streamline to turbulent beyond a critical speed?

Q9. Why does a liquid’s surface tension decrease with increasing temperature?

Q10. Why do fluids exert pressure only normal to a surface at rest?

NEET PhysicsMechanical Properties of Fluids

Free MCQ Test 19 of 22

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A bubble of radius \( 3 \, \text{mm} \) is blown at \( 30 \, \text{cm} \) depth in water (\( \rho = 1000 \, \text{kg/m}^3 \), \( S = 0.0727 \, \text{N/m} \)). What is the total pressure inside? (Take \( P_a = 1.01 \times 10^5 \, \text{Pa} \), \( g = 10 \, \text{m/s}^2 \))

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Physics preparation, focusing specifically on the chapter Mechanical Properties of Fluids. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Pressure, Narrower, Statement, Incorrect, Regarding, and Torricelli.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. A bubble of radius \( 3 \, \text{mm} \) is blown at \( 30 \, \text{cm} \) depth in water (\( \rho = 1000 \, \text{kg/m}^3 \), \( S = 0.0727 \, \text{N/m} \)). What is the total pressure inside? (Take \( P_a = 1.01 \times 10^5 \, \text{Pa} \), \( g = 10 \, \text{m/s}^2 \))

  • A. 1.02 × 10⁵ Pa
  • B. 1.03 × 10⁵ Pa
  • C. 1.04 × 10⁵ Pa
  • D. 1.05 × 10⁵ Pa

Q2. A pipe narrows from \( 0.07 \, \text{m}^2 \) to \( 0.035 \, \text{m}^2 \). If water flows at \( 2.4 \, \text{m/s} \) in the wider section, what is the speed in the narrower section?

  • A. 3.6 m/s
  • B. 4.2 m/s
  • C. 4.8 m/s
  • D. 5.4 m/s

Q3. Which statement is incorrect regarding Torricelli’s law?

  • A. Speed depends on depth
  • B. It assumes non-viscous flow
  • C. It depends on fluid viscosity
  • D. It equates to free fall speed

Q4. Why does a fluid’s flow rate remain constant in a pipe of varying diameter?

  • A. Viscosity increases
  • B. Pressure remains uniform
  • C. Density varies
  • D. Mass flow rate is conserved

Q5. Why does a fluid’s viscosity contribute to energy loss in real flow systems?

  • A. It increases pressure
  • B. It converts kinetic energy to heat
  • C. It reduces fluid density
  • D. It enhances streamline flow

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