Advertisements
Advertisements
प्रश्न
Assertion: Coagulation power of Al3+ is more than Na+.
Reason: Greater the valency of the flocculating ion added, greater is its power to cause precipitation (Hardy Schulze rule).
विकल्प
Assertion and reason both are correct and the reason is correct explanation of assertion.
Assertion and reason both are correct but reason does not explain assertion.
Assertion is correct but reason is incorrect.
Both assertion and reason are incorrect.
Assertion is incorrect but reason is correct.
Advertisements
उत्तर
Assertion and reason both are correct and the reason is correct explanation of assertion.
Explanation:
To Hardy-Schulze law, the greater is the valency of the coagulating ion, the more is the power to coagulate the colloidal solution. Thus, coagulation power of Al3+is greater than that of Na+.
APPEARS IN
संबंधित प्रश्न
What is the reason for the stability of colloidal sols?
Give reasons for the following observations:
Brownian movement provides stability to the colloidal solution.
Out of BaCl2 and KCl, which one is more effective in causing coagulation of a negatively charged colloidal Sol? Give reason.
Define the following term : Brownian movement
What modification can you suggest in the Hardy-Schulze law?
Explain the terms Coagulation
What happens when an emulsion is centrifuged?
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.
Why do we add alum to purify water?
Why does leather get hardened after tanning?
Assertion: Colloidal solutions show colligative properties.
Reason: Colloidal particles are large in size.
What is common in aqua sols and solid aerosols? How do they differ?
What is Gold number?
Which of the following is used for removing change on colloidal solution?
Why a negatively charged sol is obtained when AgNO3 solution is added to KI solution?
Which of the following is a correct statement?
The conditions given below are in the context of observing Tyndall effect in colloidal solutions:
- The diameter of the colloidal particles is comparable to the wavelength of light used.
- The diameter of the colloidal particles is much smaller than the wavelength of light used.
- The diameter of the colloidal particles is much larger than the wavelength of light used.
- The refractive indices of the dispersed phase and the dispersion medium are comparable.
- The dispersed phase has a very different refractive index from the dispersion medium.
Choose the most appropriate conditions from the options given below:
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 ______.
