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Micelles are:...

Micelles are:

A

higher colligative properties as compared to common colloidal sols

B

lower colligative properties

C

same colligative properties

D

none in true

Text Solution

Verified by Experts

The correct Answer is:
B
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Assertion (A): Micelles are formed by surfactant molecules above the critical micellization concentration (CMC) . Reason(R): The conductivity of a solution having surfactant molecules decreases sharply at the CMC .

There are certain substances which behave as normal, strong electrolyte at low concentration but at higher concentration they behave as colloidal solutions due to the formation of aggeregated particles. Such colloidals called associated colloids and the aggeregated particles are called micelles. The formation of micelles take place above certain concentration called critical micelization concentration called critical micellization concentration (CMC) and a characteristic temperature. Micelles are formed only

There are certain substances which behave as normal, strong electrolyte at low concentration but at higher concentration they behave as colloidal solutions due to the formation of aggeregated particles. Such colloidals called associated colloids and the aggeregated particles are called micelles. The formation of micelles take place above certain concentration called critical micelization concentration called critical micellization concentration (CMC) and a characteristic temperature. Micelles are used in

Assertion (A): Micelles are formed by surfactant molecules above the critical micellization concentration (CMC) . Reason(R): The conductivity of a solution having surfactant molecules decreases sharply at the CMC . (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A). (b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A). (c)If (A) is incorrect, but (R) is correct. (d)If both (A) and (R) are incorrect.

Read the following statements (A - D). A - Solidification of faeces in the rectum, reduces the urge for defaecation. B - Vomiting is a reflex action C - Electrolytes like Cl - are absorbed in the gut by simple diffusion D - Micelles are formed in gut lumen How many of the above statements are correct?

The formation of micelles takes place only above

If T_(k)= Kraft temperature and CMC = Critical micelle concentration then the formation of micelles takes place only (i) Below T_(k) (ii) Below CMC (iii) Above T_(k) (iv)( Above CMC

A : Micelles can be formed at above CMC and at below Kraft temperature. R : For NaCl solution, Kraft temperature is 60^(@) C .

Micelles formation takes place

Which of the following forms anionic micelles above a certain concentration?

ALLEN-SURFACE CHEMISTRY -ASSERTION & REASO
  1. Micelles are:

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  2. Assertion(A): Langmuir adsorption is a single-layer phenomenon. Reas...

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  3. Assertion :- A sol of As(2)S(3) prepared by the action of H(2)S on As(...

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  4. Assertion(A): Physical adsorption of milecules on the surface requires...

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  5. Assertion :- Filtration of colloidal particles is not possible by filt...

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  6. Assertion :- A gas mixed with another gas forms a colloidal solution. ...

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  7. Assertion :- Lyophilic sol is more stable than lyophobic sol. Reaso...

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  8. Assertion :- Associated colloids are formed by aggregation of large no...

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  9. Assertion :- In case of chemical adsorption, (x)/(m) first increase th...

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  10. Assertion :- Physical adsorption forms multimolecular layer. Reason ...

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  11. Assertion :- The graphical representation of physical adsorption with ...

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  12. Assertion :- Zeolite is shape selective catalyst. Reason :- Size of ...

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  13. Assertion :- Lyophilic sol coagulate by adding other solvent. Reason...

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  14. Assertion :- Catalyst is more effective in powdered form. Reason :- ...

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  15. Assertion :- During physical adsorption multimolecular layers are form...

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  16. Assertion: A quious gold colloidal solution is red in colour. Reason...

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  17. Assertion(A): Alcohols are dehydrated to hydrocarbons in the pressure ...

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  18. Assertion(A): The micelle formed by sodiumm stearate in water has -COO...

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  19. Assertion: Reaction of SO(2) and H(2)S in the presence of Fe(2)O(3) ca...

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  20. Assertion(A): Fe^(3)+ can be used for coagulation of As(2)S(3) sol. ...

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  21. Assertion (A): Micelles are formed by surfactant molecules above the c...

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