Suspensions MCQs Quiz | Class 9
Class IX Science (Code 086), Unit I: Matter – Its Nature and Behaviour. This quiz covers the topic of Suspensions, specifically their definition, properties such as settling and filtration levels, and common examples. Test your understanding with these 10 MCQs, check your score, and download the answer key PDF for revision.
Overview of Suspensions
A suspension is a heterogeneous mixture containing solid particles large enough for sedimentation. Unlike solutions, the particles in a suspension do not dissolve but remain suspended throughout the bulk of the medium. These particles are visible to the naked eye.
Key Properties
- Heterogeneous Nature: Components are not uniformly distributed.
- Particle Size: Particles are larger than 100 nm in diameter.
- Visibility: Particles can be seen without a microscope.
- Sedimentation: The particles are unstable and settle down when left undisturbed.
- Filtration: Components can be separated by filtration because particles are too large to pass through filter paper.
- Tyndall Effect: Suspensions scatter a beam of light passing through them, making the path visible (until particles settle).
Common Examples
Examples encountered in daily life include muddy water, chalk powder mixed in water, flour in water, and Milk of Magnesia.
| Property | Suspension | Solution |
|---|---|---|
| Nature | Heterogeneous | Homogeneous |
| Stability | Unstable (settles) | Stable |
| Filtration | Separable | Not separable |
Quick Revision List
- Suspensions are opaque or translucent.
- They show the Tyndall effect when suspended.
- Gravity acts on the particles causing them to settle.
Extra Practice Questions
1. Why is muddy water considered a suspension?
2. Can the particles of a suspension pass through filter paper?
3. What happens to the path of light in a suspension?
4. Is a mixture of sand and water a suspension?
5. How does particle size in suspension compare to colloids?
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