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How can the two emulsion can be distingu...

How can the two emulsion can be distinguished :
(a) oil in water type (o/w) and
(b) water in oil type (w/o)

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O/W type emulsion means

Give one test to distinguish whether the given emulsion is oil in water type or water in oil type emulsion.

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CBSE COMPLEMENTARY MATERIAL-SURFACE CHEMISTRY-SHORT ANSWER-I TYPE QUESTIONS (2 MARKS)
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  2. Define the term peptization and mention its cause.

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  3. What will be the charge on colloidal solutions in the following cases ...

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  4. Write the factor upon which the catalytic reaction of shape -selectiv...

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  5. Mention two example of emulsifying agents for o/w emulsions and w/o em...

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  6. A Small amount of silica gel and that of anhyd. . . Ca Cl(2) are pla...

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  7. Write the difference between adsorption and absorption .

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  8. Write differences between physisorption and chemisorption.

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  9. Classify the following reactions as homegeneous and heterogeneous cata...

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  10. In what ways these are different : (a) a sol and gel (b) a gel and an ...

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  11. State 'Hardy Schulze Rule' with one example.

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  12. What is an emulsifying agent ? What role does it play in forming an em...

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  13. Define the terms: (a) Helmholtz electrical double layer Zeta pote...

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  14. Mention the two necessary condition for the observation of Tyndall eff...

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  15. Account for the following : (a) Artifical rain can be caused by spr...

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  16. Write chemical equations for the preparation of sols: (a) Gold sol b...

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  17. How can the two emulsion can be distinguished : (a) oil in water typ...

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  18. Why does leather get hardened after tanning ?

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  19. Why are some medicines more effective in the colloidal form ?

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  20. What happens when dialysis is prolonged?

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