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(C) Statement $a$ is correct: In $NH_3$,the orbital dipole and bond dipoles are in the same direction,whereas in $NF_3$,they oppose each other,resulti

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$a, c, d$

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(C) Statement $a$ is correct: In $NH_3$,the orbital dipole and bond dipoles are in the same direction,whereas in $NF_3$,they oppose each other,resulting in $\mu(NH_3) > \mu(NF_3)$.Statement $b$ is incorrect: $SF_4$ has a see-saw geometry due to $sp^3d$ hybridization with one lone pair.Statement $c$ is correct: According to Fajan's rule,higher oxidation state of the metal ($Sn^{4+}$ vs $Sn^{2+}$) leads to higher polarizing power,making $SnCl_4$ more covalent.Statement $d$ is incorrect: In $In_2SO_4$,the sulfate ion $(SO_4^{2-})$ contains sulfur with an octet that is not expanded beyond the standard valence shell capacity in a way that makes this statement a defining characteristic compared to others; however,$SF_4$ and $In_2SO_4$ claims are chemically flawed in this context. Thus,statements $a$ and $c$ are correct.

Identify the correct statement$(s)$ from the following:
$a$) Dipole moment of $NH_3$ is more than $NF_3$
$b$) $SF_4$ is square planar
$c$) $SnCl_4$ is more covalent than $SnCl_2$
$d$) $In_2SO_4$ sulphur atom has expanded octet

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Identify the correct statement$(s)$ from the following:$a$) Dipole moment of $NH_3$ is more than $NF_3$$b$) $SF_4$ is square planar$c$) $SnCl_4$ is more covalent than $SnCl_2$$d$) $In_2SO_4$ sulphur atom has expanded octet