Suspensions and Colloids
A suspension is a heterogeneous mixture with large particles that may settle, while a colloid has smaller dispersed particles that do not settle easily and appear fairly uniform.
Practice This ConceptMain explanation
Teacher explanation
True solutions, colloids, and suspensions differ mainly in particle size and stability. Solution particles are very small and do not scatter light clearly. Colloidal particles are larger than solution particles and can scatter light. Suspension particles are large enough to be seen or settle on standing.
Example
Muddy water is a suspension, milk is a colloid, and salt water is a true solution.
Simple analogy
Solution stays clear, colloid scatters, suspension settles.
Common confusion
Students often call colloids true solutions because they look uniform to the naked eye.
Exam tip
Use particle size, settling behaviour, filtration, and light scattering for comparison questions.
Answer writing and exam use
1-mark use
Write the exact meaning of suspensions and colloids in one clean line.
2-mark use
Define suspensions and colloids and add one example or condition.
3-mark use
Explain suspensions and colloids, show the method or example, and mention the common mistake.
Practice this concept with focused MCQs
Open the concept quiz intro first, review the test details, and then start a focused MCQ set from this concept only. Instant score and answer review are live now.
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