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Interhalogen Compounds - Structures

The order of ...

Question

The order of reactivity of some interhalogens is as follows:
$C I F_{3} > B r F_{3} > I F_{7} > B r F_{5} > B r F$ .

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Solution

The interhalogen compounds are formed by covalent bonding with two different halogens. They are more reactive than diatomic halogen molecule, as the co-valent bond between the two different halogen atoms are much weaker than the diatomic halogen molecules (except Fluorine $F_{2}$ ). So interhalogen compounds break so easily, than halogens.

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Q. Match the column I with column II and mark the appropriate choice.

Column I	Column II
(A) $C I F_{3}$	(i) Pentagonal bipyramidal
(B) $I F_{5}$	(ii) Square pyramidal
(C) $I F_{7}$	(iii) Bent T-shaped
(D) $B r F_{3}$	(iv) Square planar

Q. What are the types of hybridisation of iodine in interhalogen compounds

I F_{3}, I F_{5}

I F_{7}

, respectively?

Q. The order of reactivity of alkyl halides is as follows:

Q. (a) Account for the following :
(i) Interhalogens are more reactive than pure halogens.
(ii)

N_{2}

is less reactive at room temperature.
(iii) Reducing character increases from

N H_{3}

B i H_{3}

.

(b) Draw the structures of the following :

(i) H_{4} P_{2} O_{7}

(Pyrophosphoric acid)

(i i) X e F_{4}

Q. The stability of interhalogen compounds follows the order:

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Interhalogen Compounds - Structures

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