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Explain the following :(i) Same substance can act both as colloids and crystalloids. (ii) Artificial rain is caused by spraying salt over clouds. |
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Answer» (i) The nature of the substance whether colloid or crystalloid depends upon size of the solute particles. When the size of solute particles lies between 1 to 1000 nm, it behaves as a colloid. (ii) The colloidal water particles of the clouds get neutralized and coagulated to bigger water drops by spraying salt over clouds and as a result artificial rain is caused. |
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