Which of the following statements is correct?

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(A) Option $A$ is correct because in $SF_6$,the sulfur atom forms $6$ covalent bonds with $6$ fluorine atoms,resulting in $12$ electrons in its valenc

Vedclass · Accepted Answer

The number of electrons present in the valence shell of $S$ in $SF_6$ is $12$.

Vedclass · Answer

(A) Option $A$ is correct because in $SF_6$,the sulfur atom forms $6$ covalent bonds with $6$ fluorine atoms,resulting in $12$ electrons in its valence shell,which violates the octet rule.Option $B$ is incorrect because ionic reactions occur almost instantaneously due to the presence of free ions in solution.Option $C$ is incorrect because $SnCl_2$ has a bent geometry due to the presence of one lone pair on the $Sn$ atom.Option $D$ is incorrect because according to Fajan's rule,the ability to form ionic compounds decreases as the charge density increases. Thus,the correct order of ionic character is $Na^{+} > Mg^{2+} > Al^{3+}$.

Column $I$ (Molecules)	Column $II$ (Number of lone pairs on central atom)
$A. \ NH_3$	$1. \ \text{Two}$
$B. \ H_2O$	$2. \ \text{Three}$
$C. \ XeF_2$	$3. \ \text{Zero}$
$D. \ CH_4$	$4. \ \text{Four}$
	$5. \ \text{One}$

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