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Describe the following : (i) Tyndall e...

Describe the following :
(i) Tyndall effect
(ii) Shape-selective catalysis

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(i) Tyndall effect : The phenomenon of scattering of light by colloidal particles as a result of which the path of beam becomes visible is called Tyndall effect.
(ii) Shape-selective catalysis : The catalytic reaction which depend upon the pore structure of the catalyst and the size of the reactant and product molecules is called shape-selective catalysis.
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XII BOARDS PREVIOUS YEAR-XII BOARDS-CHEMISTRY (Theory) [SET - I]
  1. Express the relation among cell constant , resistance of the solution ...

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  2. Given that the standard electrode (E^(@)) of metals are : K^(+)//K=-...

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  3. Describe the following : (i) Tyndall effect (ii) Shape-selective c...

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  4. What is meant by coagulation of a colloidal solution? Name any method ...

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  5. Complete the following reactions (i) C(2)H(5)OC(2)H(5)+HCl to (ii...

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  6. Draw the structural formulae of the following compounds : (i) H(4)P(...

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  7. Give the chemical tests to distinguish between the following pairs of ...

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  8. Identify A and B in each of the following processes : (i) CH(3)CH(2...

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  9. Draw the structures of the monomers of the following polymers: (i) Po...

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  10. The density of copper metal is 8.95" g "cm^(-3). If the redius of copp...

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  11. What mass of NaCl ("molar mass" =58.5g mol^(-1)) be dissolved in 65g o...

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  12. Describe the role of the following : (i) NaCl in the extraction of ...

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  13. Describe the principle involved in each of the following processes of ...

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  14. Why is europium (II) more stable than cerium (II) ?

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  15. Explain the mechanism of S(N^(1)) and S(N^(2)) reactions with examples...

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  16. How would you convert the following : (i)Phenol to benzoquinone (i...

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  17. Explain the following : (a) The electron gain enthalpy with negative...

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  18. Anino acids may be acidic, alkaline or neutral, How does this happen? ...

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  19. Explain the following terms with one example in each case : (i) Foo...

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  20. (a) Explain the following terms : (i) Rate of a reaction (ii) Act...

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