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Why is the melting point of phosphorous...

Why is the melting point of phosphorous higher than that of nitrogen while the melting point of Bi is lower than that of Sb?

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CHHAYA PUBLICATION-P-BLOCK ELEMENTS-PRACTICE SET 7 (ANSWER THE FOLLOWING QUESTIONS) : -
  1. Why is the melting point of phosphorous higher than that of nitrog...

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  2. Why does R(3) P = O exist but R(3) N = O does not (R = alkyl grou...

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  3. H(2)S is acidic but H(2) O is neutral in nature - why ?

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  4. Fluorine cannot be prepared by oxidation of F^(-) ion - explain.

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  5. Interhalogen compounds are more reactive than halogen - why ?

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  6. Most of the noble gas compounds are by formed by xenon - why ?

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  7. Why is the group to which the noble gases belong termed as zero gr...

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  8. NH(3) is a better complexing agent than PH(3) - why ?

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  9. Why N(2) is chemically very inert at room termpreature ?

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  10. During manufacture of H(2)SO(4) by contact process, why is SO(3) n...

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  11. Which oxofluoride of xenon is octahedral ?

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  12. HF is weaker acid than HI. Explain.

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  13. Phosphours shows greater tendency for catenation than nitrogen .E...

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  14. Hydrolysis of XeF(6) is not a redox reaction - explain.

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  15. KHF(2) exists while KHCI(2), KHBr(2),KHI(2) do not - Why ?

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  16. Though nitrogen exhibits + 5 oxidation state is cannot form pen...

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  17. Bleaching by SO(2) is not premanent but that of Cl(2) is permane...

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  18. Write down the order of oxidising power of the oxoacids of chlor...

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