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Why is H3PO4 tribasic and H3PO3 dibasic?...

Why is `H_3PO_4` tribasic and `H_3PO_3` dibasic?

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MODERN PUBLICATION-p-BLOCK ELEMENTS-EXERCISE
  1. Although electron gain enthalpy of fluorine is less negative as compar...

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  2. Dry chlorine does not act as a bleaching agent. Why?

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  3. Why is H3PO4 tribasic and H3PO3 dibasic?

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  4. Why ICI is more reactive than I2 ?

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  5. Nitrogen exists as diatomic molecule and phosphorus as P4. Why ?

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  6. Describe the manufacture of H2SO4 by contact process?

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  7. Give reasons for the following: Chlorine has higher electron gain enth...

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  8. Give reasons for the following: Noble gases have very little tendency ...

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  9. Give reasons for the following: Elements of group 16 are more electron...

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  10. Though nitrogen exhibits + 5 oxidation state, it does not form penta-h...

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  11. Give reasons for the following: Sulphur vapour is paramagnetic.

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  12. Give reasons for the following: Moist chlorine is powerful bleaching a...

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  13. Describ chemistry of manufacture of ammonia by Haber's process and dis...

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  14. What are interhalogen compounds ? Give example.

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  15. What are noble gases? Why are they named so? Account for the fact that...

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  16. Account for the following: Acidic character increases from HF to HI.

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  17. Account for the following: There is large difference between the melti...

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  18. Account for the following: Nitrogen does not form pentahalide.

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  19. Draw the structure of the following : CIF3

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  20. Draw the structures of the following molecule : XeF4

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