Q3 / 75 · JEE Main 2026 (02 April Shift 2) · Chemistry
$SF_4$ is isostructural with:
A. $BrF_4^{\ominus}$
B. $CH_4$
C. $IF_4^{\oplus}$
D. $XeF_4$
E. $XeO_2 F_2$
Choose the correct answer from the options given below:
A. $BrF_4^{\ominus}$
B. $CH_4$
C. $IF_4^{\oplus}$
D. $XeF_4$
E. $XeO_2 F_2$
Choose the correct answer from the options given below:
- AC Only
- Correct answerBC and E Only
- CA and D Only
- DB and E Only
Solution
In $SF_4$, the central sulphur atom has $6$ valence electrons. It forms $4$ sigma bonds with fluorine atoms and has $1$ lone pair. The steric number is $5$, corresponding to $sp^3d$ hybridization, and the shape is see-saw.
In $BrF_4^{\ominus}$, the central bromine atom has $8$ valence electrons ($7 + 1$). It forms $4$ sigma bonds and has $2$ lone pairs. The steric number is $6$, corresponding to $sp^3d^2$ hybridization, and the shape is square planar.
In $CH_4$, the central carbon atom has $4$ valence electrons. It forms $4$ sigma bonds and has $0$ lone pairs. The steric number is $4$, corresponding to $sp^3$ hybridization, and the shape is tetrahedral.
In $IF_4^{\oplus}$, the central iodine atom has $6$ valence electrons ($7 - 1$). It forms $4$ sigma bonds and has $1$ lone pair. The steric number is $5$, corresponding to $sp^3d$ hybridization, and the shape is see-saw.
In $XeF_4$, the central xenon atom has $8$ valence electrons. It forms $4$ sigma bonds and has $2$ lone pairs. The steric number is $6$, corresponding to $sp^3d^2$ hybridization, and the shape is square planar.
In $XeO_2F_2$, the central xenon atom has $8$ valence electrons. It forms $4$ sigma bonds ($2$ with oxygen, $2$ with fluorine), $2$ pi bonds, and has $1$ lone pair. The steric number is $5$, corresponding to $sp^3d$ hybridization, and the shape is see-saw.
Therefore, $IF_4^{\oplus}$ and $XeO_2F_2$ are isostructural with $SF_4$.
Answer: C and E Only
In $BrF_4^{\ominus}$, the central bromine atom has $8$ valence electrons ($7 + 1$). It forms $4$ sigma bonds and has $2$ lone pairs. The steric number is $6$, corresponding to $sp^3d^2$ hybridization, and the shape is square planar.
In $CH_4$, the central carbon atom has $4$ valence electrons. It forms $4$ sigma bonds and has $0$ lone pairs. The steric number is $4$, corresponding to $sp^3$ hybridization, and the shape is tetrahedral.
In $IF_4^{\oplus}$, the central iodine atom has $6$ valence electrons ($7 - 1$). It forms $4$ sigma bonds and has $1$ lone pair. The steric number is $5$, corresponding to $sp^3d$ hybridization, and the shape is see-saw.
In $XeF_4$, the central xenon atom has $8$ valence electrons. It forms $4$ sigma bonds and has $2$ lone pairs. The steric number is $6$, corresponding to $sp^3d^2$ hybridization, and the shape is square planar.
In $XeO_2F_2$, the central xenon atom has $8$ valence electrons. It forms $4$ sigma bonds ($2$ with oxygen, $2$ with fluorine), $2$ pi bonds, and has $1$ lone pair. The steric number is $5$, corresponding to $sp^3d$ hybridization, and the shape is see-saw.
Therefore, $IF_4^{\oplus}$ and $XeO_2F_2$ are isostructural with $SF_4$.
Answer: C and E Only
Hence, the correct answer is option: 'B'.