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Why are pentahalides more covalent than ...

Why are pentahalides more covalent than trihalides?

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Higher the positive oxidation state of the central atom in a compound, more will be its polarizing power, which, in turn, increases the covalent character of the bond formed between the central atom and the other atom.
In pentahalides, the central atom is in +5 oxidation state while in trih alides it is in +3 oxidation state. Therefore, the polarizing power of the central atom in pentahalides is greater than that in trihalides. Thus, pentahalides are more covalent than trihalides.
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CHHAYA PUBLICATION-P-BLOCK ELEMENTS-SOLVED NCERT TEXTBOOK PROBLEMS
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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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  20. What is the basicity of H(3)PO(4) ?

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