EVERYDAY SCIENCE

SCIENCE

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Colloids are
A
Clear mixtures that have fully dissolved parts
B
A mixture that will separate into different parts when left to settle
C
A suspension that appears cloudy and scatters light
D
A solution that has all parts visible
Explanation: 

Detailed explanation-1: -The particles in a colloid are large enough to scatter light, a phenomenon called the Tyndall effect. This can make colloidal mixtures appear cloudy or opaque, such as the searchlight beams shown in [link]. Clouds are colloidal mixtures.

Detailed explanation-2: -Colloids and suspensions appear cloudy; unlike solutions which are much clearer. Colloids and solutions will not separate into layers; suspensions will.

Detailed explanation-3: -Colloids are able to scatter light, but suspensions cannot transmit light. Particles in a suspension can be seen by the naked eye, but those in a colloid must be viewed using a light microscope.

Detailed explanation-4: -A Colloid is an intermediate between solution and suspension. It has particles with sizes between 2 and 1000 nanometers. A colloid is easily visible to the naked eye. Colloids can be distinguished from solutions using the Tyndall effect.

Detailed explanation-5: -When a beam of light passes through a colloid, the colloidal particles present in the solution do not allow the beam to completely pass through. The light collides with the colloidal particles and is scattered (it deviates from its normal trajectory, which is a straight line).

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