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The atomic number of an element X is 8 a...

The atomic number of an element X is 8 and that of element Y is 4. Both these elements can exhibit a valency of :

A

1

B

2

C

3

D

4

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MODERN PUBLICATION-SURFACE CHEMISTRY-EXERCISE
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  3. The atomic number of an element X is 8 and that of element Y is 4. Bot...

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

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

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

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

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  11. Method by which lyophobic sol can be protected.

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

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

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

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

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  18. Which of the following curves is in accordance with Freundlich adsorpt...

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  20. Which of the following phenomenon is applicable to the process shown i...

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