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प्रश्न
A colloidal sol is prepared by the given method in the figure. What is the charge on hydrated ferric oxide colloidal particles formed in the test tube? How is the solution represented?
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उत्तर
If FeCl3 is added to NaOH, a negatively charged sol is obtained with adsorption of OH- ions. Sol is represented as Fe2O3.xH2O/OH- (negatively charged).
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संबंधित प्रश्न
What is the reason for the stability of colloidal sols?
Explain the terms Coagulation
Explain the term Tyndall effect.
What happens when a lyophilic sol is added to a lyophobic sol?
(i) Lyophobic sol is protected.
(ii) Lyophilic sol is protected.
(iii) Film of lyophilic sol is formed over lyophobic sol.
(iv) Film of lyophobic sol is formed over lyophilic sol.
Why do we add alum to purify water?
Assertion: An ordinary filter paper impregnated with collodion solution stops the flow of colloidal particles.
Reason: Pore size of the filter paper becomes more than the size of colloidal particle.
Tyndall effect is observed in
Gold number of protective colloids A, Band Dare 0.50, 0.01 and 0.10 and 0.005. The correct order of their protecting power is
Define coagulation.
6.84 g Al2(SO4)3 is needed to coagulate 2.5 L of As2S3 sol completely in 2.0 hrs. The coagulation value of Al2 (SO4)3 is ______.
