Which of the following is a characteristic feature of a suspension?
Particles can be seen with the naked eye and settle on standing.
A suspension is a heterogeneous mixture in which relatively large, insoluble solute particles remain dispersed throughout the liquid without dissolving.
Because the particle size is quite large, typically greater than 1000 nanometres, the particles are visible to the naked eye and scatter light strongly.
These particles are not stable in the mixture and gradually settle down under gravity when the suspension is left standing undisturbed.
Hence, a characteristic feature of a suspension is that particles can be seen with the naked eye and settle on standing.
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