NEET Physics: Properties of Solids and Liquids Practice Questions
14 free multiple-choice questions on Properties of Solids and Liquids for NEET Physics, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more Properties of Solids and Liquids questions in the app →Q1. The phenomenon of surface tension primarily arises due to the imbalance of forces acting on the molecules at the surface of a liquid. What causes this imbalance?
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Correct answer: A — The net inward pull of cohesive forces
Surface tension arises because the molecules in the bulk of the liquid are pulled equally in all directions by neighboring molecules (cohesive forces). At the surface, molecules only experience inward cohesive forces, leading to a net inward pull (surface tension).
Q2. Which property is directly related to the resistance encountered when a fluid moves at or above its critical velocity?
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Correct answer: B — Viscosity
Resistance to flow is governed by viscosity. Above the critical velocity, the flow behavior is highly dependent on the fluid's viscous properties.
Q3. Which of the following statements correctly represents the relationship described by Hooke's Law for an ideal elastic spring?
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Correct answer: C — The extension of the spring is directly proportional to the force applied to it.
Hooke's Law states that the force (F) applied to an elastic object is directly proportional to the extension (x) of the object within its elastic limit, i.e., F = kx, where k is the spring constant.
Q4. Terminal velocity is typically a concept applied when the object is in:
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Correct answer: D — A viscous fluid or air
Terminal velocity is defined in the context of motion through a resistive medium, typically a viscous fluid or air, where drag forces exist.
Q5. The Modulus of Rigidity is a measure of the material's resistance to which type of deformation?
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Correct answer: C — Shear deformation
The Modulus of Rigidity specifically measures the material's resistance to shear deformation (angular deformation).
Q6. A material with a very high modulus of rigidity is generally characterized as being:
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Correct answer: C — Rigid and resistant to twisting
A high modulus of rigidity indicates that the material strongly resists shearing deformation, making it very rigid and difficult to twist or shear.
Q7. If the angle of contact between water and a glass surface is 0°, what does this imply about the interaction between water and glass?
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Correct answer: D — The water completely wets the glass.
A contact angle of 0° signifies perfect wetting, meaning the adhesive forces between the water and glass are perfectly balanced with the cohesive forces within the water, resulting in the liquid spreading completely.
Q8. Young's modulus (Y) of a material is a measure of its resistance to which type of deformation?
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Correct answer: D — Longitudinal strain
Young's modulus is the ratio of longitudinal stress to longitudinal strain, defining the material's stiffness against stretching or compression along a specific axis.
Q9. For a liquid surface with a radius of curvature R, the excess pressure difference (ΔP) across that surface is approximately given by which relationship (assuming R is large)?
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Correct answer: B — ΔP = γ/ R
For a single curved interface, the excess pressure difference is fundamentally related to the surface tension (γ) and the radius of curvature (R) via the Laplace pressure equation (ΔP = γ/R).
Q10. The SI unit for specific heat capacity is the same as the SI unit for which physical quantity?
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Correct answer: D — Joule per kilogram per Kelvin
Specific heat capacity (c) is defined as the heat energy per unit mass per unit temperature change. The SI unit is J/(kg·K) (Joule per kilogram per Kelvin).
Q11. Which physical quantity is directly proportional to the heat absorbed by a substance when its temperature changes?
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Correct answer: C — Specific Heat Capacity
The heat absorbed or released (Q) is directly proportional to the mass (m) and the change in temperature (ΔT), which is defined by the specific heat capacity (c) in the formula Q=mcΔT.
Q12. A spring has a force of 10 N when stretched by 1 meter. If the spring constant (k) is calculated from this data, what is the value of k?
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Correct answer: B — 10 N/m
Using Hooke's Law, F = kx. Here, 10 N = k × 1 m, so k = 10 N/m.
Q13. Which of the following quantities is related to the rate of radiation transfer per unit area in a specific direction?
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Correct answer: A — Spectral radiance
Spectral radiance describes the radiant energy emitted or transmitted per unit area, per unit solid angle, per unit wavelength.
Q14. If a material has a very high Young's Modulus, what can be inferred about its mechanical behavior?
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Correct answer: C — It is very stiff and resists deformation significantly
A high Young's Modulus indicates that a large amount of stress is required to produce a small amount of strain, meaning the material is very stiff and resists deformation strongly.
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