Which of the following statements best describes a property of a colloid in relation to mixtures and solutions?
A colloid scatters light but does not settle on standing.
A colloid is a heterogeneous mixture whose particles (about 1–1000 nm) are larger than those of a true solution but smaller than in a suspension.
These particles are big enough to scatter a beam of light, so the path of light becomes visible (Tyndall effect).
They are too small to settle under gravity, so a colloid is stable and does not settle on standing; they also pass through ordinary filter paper, so filtering does not separate it into layers.
A true solution neither scatters light nor settles, while a suspension settles; a colloid shows scattering without settling.
Hence, the answer is A colloid scatters light but does not settle on standing.
Similar Questions
Which method can best be used to confirm the presence of a colloidal mixture due to the Tyndall effect?
Which of the following options correctly describes a suspension?
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Important Questions from Surface Chemistry
- What is the name of the effect seen when light is scattered by tiny particles in a colloidal solution?
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The following item consists of two statements, Statement I and Statement II. Examine these two statements carefully and select the correct answer using the code given below :
Statement I : Catalytic hydrogenation is highest when the catalyst remains in the powdered form
Statement II : When a catalyst is in the powdered form, its surface area becomes highestOn adding some detergent to water, the surface tension
- The process by which a chemical change takes place in a substance when electric current is passed through it is called
