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What is the action of Cone. HNO(3) and ...

What is the action of Cone. `HNO_(3) and ` dil `HNO_(3)` on copper turnings .

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Cone. `HNO_(3)` oxidises copper to cupric nitrate and itself reduces to `NO_(2)`
`Cu+4HNO_(3)rarrCu(NO_(3))_(2)+2H_(2)O+2NO_(2)`
Dilute `HNO_(3)` oxidises copper to cupric nitrate and it reduces itself to NO
`3Cu+8HNO_(3)rarr3Cu(NO_(3))_(2)+2NO+4H_(2)O`
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SUBHASH PUBLICATION-THE 'P'-BLOCK ELEMENTS-EXERCISE
  1. Why does ammonia acts as a lew is base ? Given an example.

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  2. Explain the manufacture of nitric acid by Ostwald's process.

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  3. What is the action of Cone. HNO(3) and dil HNO(3) on copper turnings...

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  4. What is the action of Cone. HNO(3) and dil HNO(3) on zinc metal.

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  5. Name the gas liberated when zinc reacts with dil HNO(3) .

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  6. Name the metals which do not react with Conc. HNO(3) give reason.

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  7. Give two differences between white phosphorus and red phosphorus.

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  8. How is phosphine prepared from calcium phosphide ?

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  9. How phosphine is prepared in the laboratory ?

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  10. Show that PH(3) is basic in nature.

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  11. Give reason: PH(3) has lower melting point than NH(3)

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  12. Give reason: Nitrogen is less reactive at room temperature.

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  13. Which allotropic from of phosphorus has discrete tetrahedral P molecul...

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  14. Bond angle in PH4+ is higher that in PH(3). Why?

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  15. Name the acid obtained when PCl(5) undergoes hydrolysis, Give equatio...

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  16. White phosphorous is heated with excess of dry chlorine to get X. X on...

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  17. Are all the five bonds of PCl(5) equivalent ? Justify your answer.

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  18. Write the structure for the following oxoacids of phosphorus. (i) Hy...

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  19. How do you account of the reducing behaviour for H(3)PO(2) ?

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  20. Mention any two reasons for the anomalous behaviour of oxygen.

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