हिंदी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Which of the following will show Tyndall effect?

Advertisements
Advertisements

प्रश्न

Which of the following will show Tyndall effect?

विकल्प

  • Aqueous solution of soap below critical micelle concentration.

  • Aqueous solution of soap above critical micelle concentration.

  • Aqueous solution of sodium chloride.

  • Aqueous solution of sugar.

MCQ
Advertisements

उत्तर

Aqueous solution of soap above critical micelle concentration.

Explanation:

Aqueous solution of soap above critical micelle concentration leads to the formation of colloidal solution. Tyndall effect is a characteristic of colloidal solution in which colloidal particles show a coloured appearance when sunlight is passes through it and seen perpendicularly.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 5: Surface Chemistry - Exercises [पृष्ठ ६५]

APPEARS IN

एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
अध्याय 5 Surface Chemistry
Exercises | Q I. 15. | पृष्ठ ६५

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.


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 an emulsion is centrifuged?


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? 


Which of the following statements are correct?

(i) Mixing two oppositely charged sols neutralises their charges and stabilises the colloid.

(ii) Presence of equal and similar charges on colloidal particles provides stability to the colloids.

(iii) Any amount of dispersed liquid can be added to emulsion without destabilising it.

(iv) Brownian movement stabilises sols.


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.


How does it become possible to cause artificial rain by spraying silver iodide on the clouds?


Why do we add alum to purify water?


Match the statement given in Column I with the phenomenon given in Column II.

Column I Column II
(i) Dispersion medium moves in an electric field (a) Osmosis
(ii) Solvent molecules pass through semi permeable
membrane towards solvent side
(b) Electrophoresis
(iii) Movement of charged colloidal particles under
the influence of applied electric potential towards
oppositely charged electrodes
(c) Electroosmosis
(iv) Solvent molecules pass through semi permeable
membranes towards solution side
(d) Reverse osmosis

Assertion: Colloidal solutions show colligative properties.

Reason: Colloidal particles are large in size.


Give reason for the following:

Lyophilic colloidal solutions are more stable than lyophobic colloidal solutions.


The important factor in the stabilization of a colloidal solution is ______


Define coagulation.


Define the following term:

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 ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×