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Why is covalent bonding of halogens alwa...

Why is covalent bonding of halogens always sigma bonding?

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Halogens have only one unpaired electron in p-orbital which is used in the formation of sigma bond.
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A covalent bond will be formed by the overlapping of atomic orbitals having single electron of opposite spin, according to the overlapping of atomic orbitals the covalent bond may be of two types : (i) Sigma bond (sigma) " " (ii) Pi bond (pi) Sigma bond is stronger bond than the Pi-bond. If atomic orbitals overlap about the nuclear axis then sigma bond is formed but when atomic orbitals overlap sideway then Pi-bond is formed. Compound having maximum bond angle is :

A covalent bond will be formed by the overlapping of atomic orbitals having single electron of opposite spin, according to the overlapping of atomic orbitals the covalent bond may be of two types : (i) Sigma bond (sigma) " " (ii) Pi bond (pi) Sigma bond is stronger bond than the Pi-bond. If atomic orbitals overlap about the nuclear axis then sigma bond is formed but when atomic orbitals overlap sideway then Pi-bond is formed. Compound having maximum bond angle is :

A covalent bond will be formed by the overlapping of atomic orbitals having single electron of opposite spin, according to the overlapping of atomic orbitals the covalent bond may be of two types : (i) Sigma bond (sigma) " " (ii) Pi bond (pi) Sigma bond is stronger bond than the Pi-bond. If atomic orbitals overlap about the nuclear axis then sigma bond is formed but when atomic orbitals overlap sideway then Pi-bond is formed. The correct order of increasing C-O bond length of CO,CO_(3)^(2-),CO_(2) is :

ICSE-P-BLOCK ELEMENTS-EXERCISE (PART-II)(DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. Arrange the given halogens in increasing order of boiling points.

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  2. Why is F2 most reactive among halogens ?

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  3. Why is covalent bonding of halogens always sigma bonding?

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  4. Why is I2 more soluble in KI than in water?

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  5. Among the halogen hydrides, which has maximum per cent of ionic charac...

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  6. Arrange the haloacids in the increasing order of acid strength.

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  7. Why HI cannot be obtained by heating KI with conc. H2SO4 ?

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  8. Which of the hydracids of halogens reacts with glass?

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  9. Iodine forms I3^(-) but F2 does not form F(3)^(-) ions. Why?

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  10. CIF3 exists but FCl3 does not exist. Why?

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  11. What is freon ?

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  12. In interhalogen compounds of the type AB5 and AB7 B is invaribly fluor...

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  13. Name the oxides of chlorine used to bleach paper pulp.

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  14. Why a dilute aqueous solution of hydrochloric acid cannot be concentra...

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  15. Why do noble gases exist as monoatomic ?

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  16. Which noble gas is radioactive?

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  17. Xe readily forms compounds but Kr does not form compounds easily. Why?

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  18. Why helium and neon not form any compounds?

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  19. How does xenon atom form compounds with fluorine even though the xenon...

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  20. Why do noble gases form compounds with fluorine and oxygen only.

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