JEE Main 2021 · 24 Feb · Shift 1 · Chemistry Q31

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ChemistrySingle correct+4 / -1Question 31 of 90

Which of the following are isostructural pairs ?

A. $\mathrm{SO_4^{2-}}$ and $\mathrm{CrO_4^{2-}}$
B. $\mathrm{SiCl_4}$ and $\mathrm{TiCl_4}$
C. $\mathrm{NH_3}$ and $\mathrm{NO_3^-}$
D. $\mathrm{BCl_3}$ and $\mathrm{BrCl_3}$

A and B only

A and C only

B and C only

C and D only

Answer and worked solution

Official answer: A

Shapes. SO₄²⁻ and CrO₄²⁻ are both tetrahedral; SiCl₄ and TiCl₄ are both tetrahedral. NH₃ is pyramidal but NO₃⁻ trigonal planar; BCl₃ is trigonal planar but BrCl₃ T-shaped.

(A)

Topics:VSEPR theory

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JEE Main 2021 · 24 Feb · Shift 1, Chemistry question 31