Among the following,the correct statements ar | vedclass

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(B) Statement $I$ is correct as $Ge$ and $Sn$ exist in the earth's crust in trace amounts $(1-2 \ ppm)$.Statement $II$ is correct as $Pb$ belongs to g

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$I, II$ only

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(B) Statement $I$ is correct as $Ge$ and $Sn$ exist in the earth's crust in trace amounts $(1-2 \ ppm)$.Statement $II$ is correct as $Pb$ belongs to group $14$ and has four valence electrons,all of which are used to form four $Pb-F$ bonds,resulting in a tetrahedral geometry.Statement $III$ is incorrect because the stability of the $+2$ oxidation state increases down the group due to the inert pair effect,making it more stable for heavier elements like $Pb$. For $Ge$,the $+4$ oxidation state is more stable than the $+2$ state,so $GeX_4$ is more stable than $GeX_2$.

Among the following,the correct statements are:
$I$. Germanium exists only in traces.
$II$. $PbF_4$ molecule is tetrahedral in shape.
$III$. $GeX_2$ is more stable than $GeX_4$.

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Among the following,the correct statements are:$I$. Germanium exists only in traces.$II$. $PbF_4$ molecule is tetrahedral in shape.$III$. $GeX_2$ is more stable than $GeX_4$.