Give the correct order of initials T or F for | vedclass

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(B) Statement $I$: According to Bent's rule,more electronegative groups prefer equatorial positions in trigonal bipyramidal geometry. In $(CH_3)_2P(CF

Vedclass · Accepted Answer

$FFT$

Vedclass · Answer

(B) Statement $I$: According to Bent's rule,more electronegative groups prefer equatorial positions in trigonal bipyramidal geometry. In $(CH_3)_2P(CF_3)_3$,the three $CF_3$ groups occupy equatorial positions,making the molecule non-polar $(\mu = 0)$. In $(CH_3)_3P(CF_3)_2$,the two $CF_3$ groups occupy axial positions,resulting in a polar molecule $(\mu 
eq 0)$. Thus,statement $I$ is false.Statement $II$: In $(CH_3)_3P(CF_3)_2$,the $CH_3$ groups are in equatorial positions. Due to the repulsion between the bulky $CF_3$ groups and the $CH_3$ groups,the $CH_3-P-CH_3$ bond angles are not equal. Thus,statement $II$ is false.Statement $III$: $PF_3$ has a pyramidal geometry with a lone pair on $P$,resulting in a net dipole moment $(\mu 
eq 0)$,making it polar. $SiF_4$ has a tetrahedral geometry,making it non-polar $(\mu = 0)$. Polar substances are more soluble in polar solvents. Thus,statement $III$ is true.The correct order is $FFT$.

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