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Elements having valency ‘one’ are :...

Elements having valency ‘one’ are :

A

always metals

B

always non metals

C

always metalloids

D

either metals or non-metals

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MODERN PUBLICATION-SURFACE CHEMISTRY-EXERCISE
  1. Give the number of protons, neutrons and electrons in the chlorine ha...

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  2. The mass number of two atoms X and Y is the same (40 each) but their a...

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  3. Elements having valency ‘one’ are :

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  4. For an element, Z = 9. The valency of this element will be :

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  5. The number of valence electrons in a sulphide ion, S2–, is :

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  6. The atomic number of an element X is 8 and that of element Y is 4. Bot...

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  7. What is the number of valence electrons in : (a) sodium ion, Na+

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  8. In physisorption adsorbent does not show specificity for any particula...

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  9. Which of the following is an example of absorption ?

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  10. On the basis of data given below predict which of the following gases ...

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  11. In which of the following reactions heterogenous catalyse is involved?...

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  12. What is the number of valence electrons in : (b) oxide ion, O2–

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  13. Atom A has a mass number 209 and atomic number 82. Atom B has a mass n...

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  14. Method by which lyophobic sol can be protected.

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  15. Freshly prepared precipitate sometimes gets converts colloidal solutio...

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  16. Which of the following electrolytes will have maximum coagulating valu...

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  17. A colloidal system having a solid substances as a dispersed phase and ...

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  18. The values of colligative properties of colloidal solution are of smal...

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  19. Atom A has a mass number 209 and atomic number 82. Atom B has a mass n...

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  20. Atom A has a mass number 209 and atomic number 82. Atom B has a mass n...

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