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Why is PCl(5) more covalent than PCl(3) ...

Why is `PCl_(5)` more covalent than `PCl_(3)` ?

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The oxidation state of P in `PCl_(5)` is +5 and that in `PCl_(3)` us +3. Since elements in the +5 oxidation state have less tendency to lose electrons than in the +3 oxidation state, therefore, P in the +5 oxidation state has more tendency to share its electrons with Cl than in the +3 oxidation state. Thus, `PCl_(5)` is more covalent than `PCl_(3)`
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Why is PCl_(5) molecule more covalent than PCl_(3) molecule ?

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Account for the following : (i) PCl_(5) is more covalent than PCl_(3) . (ii) Iron on reaction with HCl forms FeCl_(2) and not FeCl_(3) . (iii) The two O-O bond lengths in the ozone molecule are equal.

Give reasons : (i) PCl_(5) is more volatile than PCl_(3) . (ii) O-O bond has lower bond dissociation enthalpy than S-S bond. (iii) F_(2) is stronger oxidising than Cl_(2) .

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PRADEEP-P-BLOCK ELEMENTS -VERY SHORT ANSWER QUESTIONS
  1. Give the chemical equation for the reaction the occurs between iron an...

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

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  3. Why is PCl(5) more covalent than PCl(3) ?

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  4. Why does PCl(5) fume in moisture ?

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  5. Complete the following reactions : (i) P(4) + SOCl(2) rarr (ii) CH...

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  6. Suggest a method for the laboratory preparation of DCl. Write a balan...

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  7. What is the oxidation number of phosphorus in H(3)PO(2) molecule ?

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  8. What should be the order of acidic strength in the series H(3)PO(4), H...

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  9. Why does H(3)PO(3) act as a reducing agent but H(3)PO(4) does not ?

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  10. Why does orthophosphoric acid exist as a syrupy liquid ?

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  11. How is pyrophosphoric acid related to orthophosphoric acid ?

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  12. Why are the group 16 element called chalcogens ?

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  13. What is the outer shell electronic configuration of the chalcogens ?

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  14. Write the structure of a chalcogenide dianion.

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  15. Name the allotropes of oxygen.

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  16. The two O-O bond lengths in ozone molecule are equal. Assign reason.

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  17. Ozone is thermodynamically unstable. Give reasons.

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  18. How the supersonic jet aeroplanes are responsible for the depletion of...

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  19. Find out the oxidation number of S in (i) SO(2)Cl(2) and (ii) Na(2)S(2...

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  20. Why OF(6) does not exist but SF(6) exists ?

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