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Which of the following statements is/are correct regarding the liquid state of matter?
Statement I: Liquids have fixed volume but no fixed shape.
Statement II: The rate of diffusion of liquids is higher than that of solids.
Neither statement I nor II is correct.
Only statement II is correct.
Both statements I and II are correct.
Only statement I is correct.
Both statements I and II are correct.
Liquids possess a definite volume because their particles are held together by sufficient intermolecular forces, but they lack a fixed shape and take the shape of their container due to the ability of particles to slide past one another. The rate of diffusion in liquids is significantly higher than in solids because liquid particles have more kinetic energy and larger intermolecular spaces, allowing them to move more freely.
Liquids possess a definite volume because their particles are held together by sufficient intermolecular forces, but they lack a fixed shape and take the shape of their container due to the ability of particles to slide past one another. The rate of diffusion in liquids is significantly higher than in solids because liquid particles have more kinetic energy and larger intermolecular spaces, allowing them to move more freely.
Think of water in a glass: if you pour that water into a bowl, it fills the bowl perfectly (no fixed shape), but the amount of water remains exactly the same (fixed volume).
KE=21тАЛmv2 тАФ Kinetic energy governs the mobility of particles in different states of matter.
In the liquid state, the kinetic energy of particles is greater than in the solid state, leading to weaker intermolecular forces of attraction. This allows for fluid motion (flow) rather than rigid positioning, facilitating both the acquisition of the container's shape and the process of diffusion where particles spontaneously mix due to random motion.
Solids have fixed volume and fixed shape due to strong, rigid intermolecular forces.
Liquids have fixed volume but no fixed shape due to moderate intermolecular forces allowing flow.
Gases have neither fixed volume nor fixed shape due to negligible intermolecular forces.
Diffusion rate: Gas > Liquid > Solid.
Mixing of dyes in water
Gas exchange in aquatic organisms via dissolved oxygen
| Feature | Solid | Liquid |
|---|---|---|
Intermolecular Force | Strong | Moderate |
Rate of Diffusion | Very Low | Higher |
Diffusion in liquids is slow compared to gases but faster than in solids, where particle movement is restricted to vibrational motion about fixed positions.
Option A, B, and D are incorrect because they fail to acknowledge that both statements accurately describe the physical properties of matter.
C is correct тАФ Both statement I and statement II are scientifically accurate descriptions of the physical behavior of liquids.
Always remember the trend of kinetic energy and intermolecular space: Solid < Liquid < Gas. This single hierarchy explains differences in density, diffusion, and shape/volume properties.
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