Properties Of Solids And Liquids Important Questions for NEET Physics - 2026

1. Multiple choice questions.

Q1. The stress required to produce a unit strain in a material is called:

• (a) Flexibility
• (b) Elastic modulus
• (c) Plasticity
• (d) Ductility

Answer: (b) Elastic modulus.

Q2. The terminal velocity $v_t$ of a sphere moving through a viscous fluid is directly proportional to:

• (a) Radius
• (b) Square of radius
• (c) Cube of radius
• (d) Inverse of radius

Answer: (c) Cube of radius.

Q3. For a soap bubble, the excess pressure inside the bubble is given by:

• (a) $\frac{4T}{r}$
• (b) $\frac{2T}{r}$
• (c) $\frac{T}{2r}$
• (d) $\frac{T}{r}$

Answer: (a) $\frac{4T}{r}$.

Q4. Which one of the following is the correct expression for Young's modulus ($Y$)?

• (a) $\frac{\text{Stress}}{\text{Strain}}$
• (b) $\frac{\text{Strain}}{\text{Stress}}$
• (c) Stress × Strain
• (d) Stress – Strain

Answer: (a) $\frac{\text{Stress}}{\text{Strain}}$.

Q5. Bernoulli’s principle is a consequence of the law of:

• (a) Conservation of mass
• (b) Conservation of momentum
• (c) Conservation of energy
• (d) Conservation of temperature

Answer: (c) Conservation of energy.

2. Very Short Answer (VSA).

Q1. State Hooke's Law.

Answer: Within elastic limits, stress applied to a body is directly proportional to the resulting strain. Mathematically, Stress ∝ Strain.

Q2. Define surface tension.

Answer: Surface tension is the force per unit length acting at the surface of a liquid at rest, which tends to minimize the surface area.

Q3. What is calorimetry?

Answer: Calorimetry is the measurement of heat exchanged in physical or chemical processes using a device called a calorimeter.

Q4. What is meant by terminal velocity?

Answer: Terminal velocity is the constant speed attained by a body when the net force on it becomes zero as it moves through a fluid.

Q5. What is the SI unit of viscosity?

Answer: The SI unit of viscosity is pascal second (Pa·s) or kg·m⁻¹·s⁻¹.

3. Short Answer Questions.

Q1. Explain the effect of gravity on fluid pressure with an expression.

Answer: Pressure at depth $h$ in a fluid is $P = P_0 + \rho gh$, where $P_0$ is atmospheric pressure, $\rho$ is fluid density, and $g$ is acceleration due to gravity. This shows pressure increases linearly with depth due to gravity, which is crucial in understanding hydrostatic phenomena.

Q2. Describe the applications of surface tension in daily life.

Answer: Surface tension enables insects to walk on water, leads to capillary rise in plants, and helps formation of droplets and soap bubbles. It is also utilized in the cleaning action of detergents which reduce surface tension, allowing better wetting of surfaces.

Q3. Calculate the amount of heat required to convert 100g of ice at 0°C to water at 0°C. (Latent heat of fusion of ice = 334 J/g)

Answer:

1. Given mass of ice, $m = 100\,\mathrm{g}$
2. Latent heat, $L = 334\,\mathrm{J/g}$
3. Heat required, $Q = mL = 100 \times 334 = 33400\,\mathrm{J}$

Answer: 33400 J of heat is required.

Q4. Differentiate between streamline and turbulent flow.

Answer: In streamline flow, fluid particles move along well-defined paths that do not cross each other, resulting in smooth flow. In turbulent flow, the motion is irregular with eddies and swirls, commonly occurring at high velocities or with obstacles.

Q5. Discuss any two applications of Pascal's law.

Answer: Pascal’s law is applied in hydraulic brakes, where small force at the pedal exerts large force at wheels. It is also used in hydraulic lifts, enabling heavy objects’ lifting with minimal effort using fluid pressure transfer.

4. True or False Questions.

Q1. Bulk modulus is defined as the ratio of volumetric stress to volumetric strain.

Answer: True.

Q2. Bernoulli’s equation can be applied to viscous and non-steady flows.

Answer: False.

Q3. The viscosity of liquids decreases with an increase in temperature.

Answer: True.

Q4. Angle of contact between water and glass is obtuse.

Answer: False.

Q5. The latent heat of vaporization is always greater than the latent heat of fusion for a substance.

Answer: True.

3. Fill in the Blanks Questions.

Q1. The property of a liquid by which its free surface behaves like a stretched elastic membrane is called ________.

Answer: surface tension

Q2. According to Stokes’ law, the force experienced by a small spherical body falling through a viscous fluid is ________.

Answer: $6\pi \eta r v$

Q3. The SI unit of Young’s modulus is ________.

Answer: Pascal (Pa)

Q4. During heat transfer by conduction, heat flows from ________ temperature to ________ temperature.

Answer: higher, lower

Q5. ________ principle explains the rise of a liquid in a capillary tube.

Answer: Surface tension

How Properties of Solids and Liquids Prepare You for NEET Physics Success

Learning topics like Hooke's Law, Young's modulus, and fluid pressure helps students solve real NEET questions. With the right practice, you can easily identify NEET's favorite Physics concepts and answer with confidence in the exam hall.

Clear knowledge of Bernoulli’s principle, viscosity, and surface tension is important for scoring well. This chapter contains many scoring areas that frequently appear in NEET. Practice these questions to build strong Physics fundamentals for NEET 2026.

At Vedantu, lists and explanations designed for NEET Physics aspirants are provided in a simple manner. Revision of these topics like thermal expansion and heat transfer boosts your concept recall—key to solving NEET Physics questions quickly and accurately.