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प्रश्न
Comment on the statement that “colloid is not a substance but a state of substance”.
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उत्तर
Common salt (a typical crystalloid in an aqueous medium) behaves as a colloid in a benzene medium. Hence, we can say that a colloidal substance does not represent a separate class of substances. When the size of the solute particle lies between 1 nm and 1000 nm, it behaves as a colloid.
Hence, we can say that a colloid is not a substance but a state of the substance, which is dependent on the size of the particle. A colloidal state is intermediate between a true solution and a suspension.
संबंधित प्रश्न
Choose the correct option.
The size of colloidal particles lies between ______.
Identify the dispersed phase and dispersion medium in the following colloidal dispersions.
- milk
- blood
- printing ink
- fog
What happens when a beam of light is passed through a colloidal sol.
Explain the term emulsion and types of emulsions.
Explain micelle formation in a soap solution.
Draw labelled diagram Dialysis.
Which type of colloid is formed on the dissolution of soap in water?
Mist is a colloidal solution of ____________.
In coagulation of positively charged ferric hydroxide sol, the most and least effective ions are ____________ and ____________ respectively.
Which of the following statements is CORRECT?
The order of coagulating power of following ions in the coagulation of a positive sol is:
i. \[\ce{PO^{3-}_4}\]
ii. \[\ce{SO^{2-}_4}\]
iii. \[\ce{[Fe(CN)6]^{4-}}\]
iv. \[\ce{NO^-_3}\]
Maximum coagulation power is in ____________.
Tyndall effect is observed due to ____________.
Smoke is an example of ____________.
What happens when electric field is applied to colloidal solution?
A colloid is formed by adding \[\ce{FeCl3}\] in excess of hot water. What will happen if excess sodium chloride is added to this colloid?
Colloids can
