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Question
A colloidal system is a two-phase system. Point out which of the following combination can not be considered a colloidal system?
A colloidal system is a two-phase system. Point out which of the following combination can not be considered a colloidal system?
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Solution
The correct option is B gas-gas
A solid-solid combination can be considered as a colloidal solution and the nature of the solution is solid sol. For example, colorful stone.
A liquid-liquid solution can be considered as a colloidal solution and the nature of the solution is an emulsion. Example, milk
A liquid-gas combination can be considered as a colloidal solution and the nature of the solution is aerosol. For example, cloud.
A gas-gas combination can not be considered as a colloidal solution because this is homogeneous mixture and a colloidal solution is always a heterogeneous mixture.
Hence, option C is correct.
A solid-solid combination can be considered as a colloidal solution and the nature of the solution is solid sol. For example, colorful stone.
A liquid-liquid solution can be considered as a colloidal solution and the nature of the solution is an emulsion. Example, milk
A liquid-gas combination can be considered as a colloidal solution and the nature of the solution is aerosol. For example, cloud.
A gas-gas combination can not be considered as a colloidal solution because this is homogeneous mixture and a colloidal solution is always a heterogeneous mixture.
Hence, option C is correct.
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