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For the above change which statement is correct?

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In each step two coordinate bonds are formed

Central atom 'A' has five electron in 'p' subshell of its valence shell

Central atom 'A' belongs to 15th group

No such change is possible

answer is C.

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Detailed Solution

General E · C of outermost shell:

$n s^{2} n p^{5}$

The configuration for the change,
$1 s^{2} 2 s^{2} 2 p^{6} 3 c^{2} 3 p^{5}$

So Central atom 'A' has five electron in 'p' subshell of its valence shell.

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