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What valency will be shown by an element...

What valency will be shown by an element having atomic number 15 ?

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MODERN PUBLICATION-SURFACE CHEMISTRY-EXERCISE
  1. What valency will be shown by an element having atomic number 15 ?

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  2. True or False : Physical adsorption increases with rise in temperature...

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  3. True or False : Chemisorption is irreversible while physisorption is r...

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  4. True or False : Selectivity is the ability of a catalyst to direct the...

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  5. True or False : At low pressure, the extent of adsorption is directly ...

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  6. True or False : Al(NO3)3 has higher coagulating power than MgSO4 for F...

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  7. True or False : Gel is a system in which liquid is the dispersed phase...

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  8. the protective power of the lyophilic colloids es expressed in terms o...

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  9. True or False : Greater the flocculation value of an electrolyte, grea...

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  10. True or False : Adsorption is always multimolecular.

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  11. True or False : Colloidal sols are always heterogeneous.

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  12. Complete the missing links : Milk is an example of............. in ......

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  13. The phenomenon in which adsorption and absorption takes place simultan...

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  14. The nature of forces involved in physical adsorption are ................

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  15. The formation of micelles takes place above a particular temperature c...

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  16. The movement of colloidal particles under the influence of an electric...

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  17. The scattering of light by colloidal particles is called ........... .

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  18. The swelling of gel in water is called ............. .

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  19. ............. is the process of Separating the crystalloids from collo...

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  20. Colloidal solution of gold in water is called ............... .

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  21. In whipped cream, the dispersion medium is................ and dispers...

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