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ClF(3) exists but FCl(3) does not. Why ?...

`ClF_(3)` exists but `FCl_(3)` does not. Why ?

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Chlorine has vacant 3d-orbitals and an electron can be promoted from 3p filled orbital to 3d orbital. Thus, chlorine can show a cavalency of 3 in its compunds and a molecule of `ClF_(3)` can exist. But fluroine has no vacant 2d orbitals and can exhibit only cavalency of one in its compounds. Thus, a molecule of `FCl_(3)` fails to exist.
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DINESH PUBLICATION-THE P-BLOCK ELEMENTS -Concept Based Questions
  1. Reducing character decreases from SO(2) " to " TeO(2). Explain.

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  2. Why is iodine more soluble in KI solution than in water ?

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  3. Iodine is liberated in the reaction between KI and CU^(2+) ions but ch...

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  4. Lithium fluroide (LiF) is mainly ionic but lithium iodide (LiI) is cov...

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  5. Interhalogen compounds are more reactive than halogens. Why ?

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  6. ClF(3) exists but FCl(3) does not. Why ?

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  7. Ferric iodide is very unstable but ferric chloride is stable. Explain.

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  8. HF is not stored in glass bottles but is kept in wax bottles. Assign r...

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  9. KHF(2) is a well known compound whereas KHCl(2) does not exist. Why ?

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  10. Fluorine does not show variable oxidation states while other members o...

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  11. Chlorine water has both oxidising as well as bleaching properties prop...

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  12. On addition of ozone gas to KI solution, violet vapours are obtained. ...

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  13. Despite having greater polarity, hydrogen fluoride boils at a lower te...

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  14. The conjugate base of HClO(4) is a weaker base than H(2)O. Explain.

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  15. The group of noble gas elements is called zero group. Why ?

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  16. Noble gas elements form compounds only with fluorine and oxygen. Expla...

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  17. Helium and neon do not form compounds with fluorine. Assign reason.

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  18. Why is neon used in illuminating warning signal. Why ?

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  19. Xenon does not form fluorides such as XeF(3) and XeF(5). Explain.

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  20. Structure of xenon fluorides cannot be explained by valence bond theor...

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