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प्रश्न
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?
उत्तर
\[\ce{FeCl3}\] when added into hot water, it forms hydrated ferric oxide, which is a positively charged sol due to absorption of \[\ce{Fe^{3+}}\] ions. On adding \[\ce{NaCl}\] the negatively charged chloride ions neutralize the positive charge of the solution and coagulation of the sol takes place.
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संबंधित प्रश्न
Which of the following is NOT true for lyophilic colloids?
Tyndall effect is observed due to ____________.
Froth is a colloidal solution of ____________.
Which of the following compounds forms a colloidal solution when dissolved in water?
Freshly prepared precipitate sometimes gets converted to colloidal solution by ______.
A colloidal system having a solid substance as a dispersed phase and a liquid as a dispersion medium is classified as ______.
An emulsion cannot be broken by:
(i) heating
(ii) adding more amount of dispersion medium
(iii) freezing
(iv) adding emulsifying agent
Which of the following substances will precipitate the negatively charge emulsion
Van Arkel's method of purification of metals involves converting the metal to a ______.
Identify positively charged sol from following.
