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Which of the following statements does NOT represent a property of a suspension?
The particles of a suspension scatter a beam of light passing through it.
A suspension is a heterogeneous mixture.
The particles of a suspension cannot be seen by the naked eyes.
A suspension is unstable in nature.
The particles of a suspension cannot be seen by the naked eyes.
In a suspension, the solute-like particles are large enough to be seen easily with the naked eye (usually larger than 100┬аnm or 0.1┬а\mum). Therefore, stating that "the particles of a suspension cannot be seen by the naked eyes" is incorrect and represents a false property.
In a suspension, the solute-like particles are large enough to be seen easily with the naked eye (usually larger than 100┬аnm or 0.1┬а\mum). Therefore, stating that "the particles of a suspension cannot be seen by the naked eyes" is incorrect and represents a false property.
Chalk powder mixed in water or muddy water is a classic suspension; you can clearly see the suspended solid particles floating or settling down at the bottom of the container.
TIN: True solutions are transparent, Colloids scatter, Suspensions settle.
d>100┬аnm тАФ Particle size range for suspensions
Heterogeneous mixture тАФ Non-uniform composition
A suspension is a heterogeneous mixture in which the solid particles do not dissolve but remain suspended throughout the medium. Because of their relatively large particle size, they scatter a beam of light passing through them (Tyndall effect) and eventually settle down under gravity when left undisturbed, making the mixture unstable.
Suspensions are heterogeneous mixtures of a solid in a liquid or gas.
The particle size in a suspension is greater than 100┬аnm.
Particles in a suspension can be seen with the naked eye.
Suspensions are unstable and particles settle down when left undisturbed.
Useful for delivering insoluble drugs as oral liquid suspensions.
Prone to caking and rapid sedimentation if not stabilized with suspending agents.
Muddy water
Chalk suspended in water
Milk of magnesia
True solutions have particle size <1┬аnm and do not scatter light.
Colloidal solutions have particle size between 1┬аnm and 100┬аnm and exhibit the Tyndall effect distinctly without settling.
C is correct тАФ The particles of a suspension can be seen by the naked eyes, making the statement in option C incorrect as a property.
Always differentiate mixtures based on particle size: Solution (<1┬аnm), Colloid (1┬аnm to 100┬аnm), and Suspension (>100┬аnm). Only solutions are homogeneous.
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