Advertisements
Advertisements
प्रश्न
Out of BaCl2 and KCl, which one is more effective in causing coagulation of a negatively charged colloidal Sol? Give reason.
Advertisements
उत्तर
According to the Hardy–Schulze rule, the greater the valency of a flocculating ion, the greater is its power to cause precipitation. Between Ba2+ (from BaCl2) and K+ (from KCl), Ba2+ has greater valency. Therefore, BaCl2 will be more effective in causing the coagulation of a negatively charged colloidal sol.
APPEARS IN
संबंधित प्रश्न
Give reasons for the following observations: Leather gets hardened after tanning.
Explain what is observed when an electric current is passed through a colloidal sol?
What happens when a freshly prepared precipitate of Fe(OH)3 is shaken with a small amount of FeCl3 solution?
What happens when an emulsion is centrifuged?
Which of the following will show 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.
Which phenomenon occurs when an electric field is applied to a colloidal solution and electrophoresis is prevented?
(i) Reverse osmosis takes place.
(ii) Electroosmosis takes place.
(iii) Dispersion medium begins to move.
(iv) Dispersion medium becomes stationary.
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.
What is common in aqua sols and solid aerosols? How do they differ?
Coagulation value of the electrolytes AlCl3 and NaCl for As2S3 sol are 0.093 and 52 respectively. The No. of times AlCl3 has greater coagulating power than NaCl is ______.
