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प्रश्न
Comment on the statement:
Colloid is not a substance but it is a state of substance.
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उत्तर
The statement is true. Because the same substance may exist as a colloid under certain conditions and as a crystalloid under certain other conditions. For example, NaCl in water behaves as a crystalloid, while in benzene, it behaves as a colloid. Similarly, dilute soap solution behaves like a crystalloid, while concentrated solutions behave like a colloid. It is the size of the particles that matters. That is the state in which the substance exists. If the size of the particles lies in the range of 1 nm to 100 nm, it is in the colloidal state.
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संबंधित प्रश्न
Statement: To stop bleeding from an injury, ferric chloride can be applied. Which comment about the statement is justified?
In an electrical field, the particles of a colloidal system move towards the cathode. The coagulation of the same sol is studied using
I. K2SO4
II. Na3PO4
III. K4[Fe(CN)6]
IV. NaCI
Their coagulating power should be
The coagulation values in millimoles per litre of the electrolytes used for the coagulation of As2S3 are given below
(I) (NaCl) = 52
(II) (BaCl2) = 0.69
(III) (MgSO4) = 0.22
The correct order of their coagulating power is:
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What is the difference between sol and gel?
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Which one of the is not a surfactant?
Which one of the is not a surfactant?
Which one of the is not a surfactant?
