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What is observed in the following situations? 1. When a beam of light is passed through a colloid. 2. When an electrolyte, NaCl is added to

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What is observed in the following situations?

1. When a beam of light is passed through a colloid.

2. When an electrolyte, NaCl is added to hydrated ferric hydroxide sol.

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1. Tyndall cone is observed due to Tyndall effect. Scattering of light by colloidal particles is called Tyndall effect.

2. The coagulation of ferric hydroxide sol is observed. This is in accordance with Hardy-Schulze rule.

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