Which of the following solutions not showing Tyndall effect?

Common salt

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Sodium carbonate

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Starch

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Milk

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Solution

The correct option is D Sodium carbonate
Tyndall effect is a light scattering phenomenon. It is usually takes place in colloids or in a very fine suspension. Tyndall effect is used for the distinction between colloid and a solution.
Common salt, milk and starch show Tyndall effect. Starch may appear blue when in suspension due to the Tyndall effect.

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