Question:
Identify the pair of species with same geometries
Identify the pair of species with same geometries
Show Hint
Species with type
\[
AX_2E_3
\]
always have linear geometry because three lone pairs occupy equatorial positions in trigonal bipyramidal arrangement.
Updated On: Jun 25, 2026
- \(XeF_4,\ PCl_4^+\)
- \(NH_3,\ ClF_3\)
- \(SF_4,\ NH_4^+\)
- \(XeF_2,\ I_3^-\)
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The Correct Option is D
Solution and Explanation
Step 1: Determine geometry of \(XeF_4\) and \(PCl_4^+\).
For \(XeF_4\): \[ AX_4E_2 \] Geometry is square planar.
For \(PCl_4^+\): \[ AX_4 \] Geometry is tetrahedral.
Hence, geometries are different.
Step 2: Determine geometry of \(NH_3\) and \(ClF_3\).
For \(NH_3\): \[ AX_3E \] Geometry is trigonal pyramidal.
For \(ClF_3\): \[ AX_3E_2 \] Geometry is T-shaped.
Hence, geometries are different.
Step 3: Determine geometry of \(SF_4\) and \(NH_4^+\).
For \(SF_4\): \[ AX_4E \] Geometry is see-saw.
For \(NH_4^+\): \[ AX_4 \] Geometry is tetrahedral.
Hence, geometries are different.
Step 4: Determine geometry of \(XeF_2\) and \(I_3^-\).
For \(XeF_2\): \[ AX_2E_3 \] Geometry is linear.
For \(I_3^-\): \[ AX_2E_3 \] Geometry is also linear.
Thus, both species have same geometry.
Step 5: Final conclusion.
Hence, the correct pair having same geometry is \[ \boxed{XeF_2,\ I_3^-} \]
For \(XeF_4\): \[ AX_4E_2 \] Geometry is square planar.
For \(PCl_4^+\): \[ AX_4 \] Geometry is tetrahedral.
Hence, geometries are different.
Step 2: Determine geometry of \(NH_3\) and \(ClF_3\).
For \(NH_3\): \[ AX_3E \] Geometry is trigonal pyramidal.
For \(ClF_3\): \[ AX_3E_2 \] Geometry is T-shaped.
Hence, geometries are different.
Step 3: Determine geometry of \(SF_4\) and \(NH_4^+\).
For \(SF_4\): \[ AX_4E \] Geometry is see-saw.
For \(NH_4^+\): \[ AX_4 \] Geometry is tetrahedral.
Hence, geometries are different.
Step 4: Determine geometry of \(XeF_2\) and \(I_3^-\).
For \(XeF_2\): \[ AX_2E_3 \] Geometry is linear.
For \(I_3^-\): \[ AX_2E_3 \] Geometry is also linear.
Thus, both species have same geometry.
Step 5: Final conclusion.
Hence, the correct pair having same geometry is \[ \boxed{XeF_2,\ I_3^-} \]
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