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Question

The correct order of increasing s−character (in percentage) in the hybrid orbitals of following molecules/ions is:
(I) CO2−3
(II) XeF4
(III) I−3
(IV) NCl3
(V) BeCl2

A
II < III < IV < I < V
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B
II < IV < III < V < I
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C
III < II < I < V < IV
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D
II < IV < III < I < V
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Solution

The correct option is A II < III < IV < I < V
The correct order of increasing scharacter (in percentage) in the hybrid orbitals of following molecules/ions is:

(I) CO23 C undergoes sp2

(II) XeF4 Xe undergoes sp3d2

(III) I3 I undergoes sp3d

(IV) NCl3 N undergoes sp3

(V) BeCl2 Be undergoes sp.

S-character in hybrid orbitals increases as the number of p orbitals and d orbitals in the hybridization.
So the correct order of S-character in hybrid orbitals is sp>sp2>sp3>sp3d>sp3d2.

So the correct option is II<III<IV<I<V.

Hence option A is correct.

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