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Though nitrogen exhibits +5 oxidation st...

Though nitrogen exhibits +5 oxidation state it does not form pentahalide. Give reason.

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Nitrogen having n = 2 , possesses only s and p orbitals. It does not have d orbitals, hence, it cannot expand its covalence beyond four. It is for this reason, nitrogen does not form pentahalide though it exhibits +5 oxidation state.
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CHHAYA PUBLICATION-P-BLOCK ELEMENTS-SOLVED NCERT TEXTBOOK PROBLEMS
  1. Though nitrogen exhibits +5 oxidation state it does not form pentahali...

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  2. PH(3) has lower boiling point than NH(3) . Why?

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  3. Why are pentahalides more covalent than trihalides?

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  4. Why is BiH(3) the strongest reducing agent amongst all the hydrides of...

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  5. Write the reaction of thermal decomposition of sodium azide.

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  6. Why is N(2) less reactive at room temperature?

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  7. Why does NH(3) act as a Lewis base?

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  8. Mention the conditions requlred to maximise the yield of ammonia.

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  9. How does ammonia react with a solution of Cu2^(+)?

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  10. Why does NO(2) dimerise?

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  11. What is the covalence of nitrogen in N(2)O(5) ?

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  12. In what way can it be proved that PH(3) is basic in nature?

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  13. Bond angle in PH(4)^(+) is higher than that in PH(3). Why?

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  14. What happens when white phosphorus is heated with concentrated NaOH so...

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  15. Why does PCl(3) fume in moisture?

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  16. Are all the five bonds in PCl(5) molecule equivalent? Justify your ans...

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  17. What happens when PCl(5) is heated?

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  18. Write a balanced equation for the hydrolytic reaction of PCl(5) in hea...

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

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  20. What is the basicity of H(3)PO(4) ?

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