JEE Main 2026 Apr 5 Shift 2, Chemistry Q9: Valence Shell Electron Pair Repulsion (VSEPR) Theory

JEE Main2026Apr 5, Shift 2Chemistry

Given below are two statements:

Statement-I: Aluminium upon reaction with NaOH forms $[A l (O H)_{6}]^{3 -}$ ion.

Statement-II: The geometry of $I C l_{4}^{-}$ , $C l O_{3}^{-}$ and $I B r_{2}^{-}$ is square planar, pyramidal and linear respectively.

In the light of the above statements, choose the correct answer from the options given below:

A
Both Statement-I and Statement-II are true.
B
Both Statement-I and Statement-II are false.
C
Statement-I is true but Statement-II is false.
D
Statement-I is false but Statement-II is true.

Solution

Statement-I: The product of Al with aqueous NaOH is tetrahydroxoaluminate, $[A l (O H)_{4}]^{-}$ (i.e., $N a [A l (O H)_{4}]$ along with $H_{2}$ gas), not the hexahydroxo species. False.

Statement-II: $I C l_{4}^{-}$ has $s p^{3} d^{2}$ hybridisation with two lone pairs in axial positions $\Rightarrow$ square planar. $C l O_{3}^{-}$ is $s p^{3}$ with one lone pair $\Rightarrow$ pyramidal. $I B r_{2}^{-}$ is $s p^{3} d$ with three equatorial lone pairs $\Rightarrow$ linear. True.

Statement-I false, Statement-II true.

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JEE Main 2026 Apr 5 Shift 2, Chemistry Q9: Valence Shell Electron Pair Repulsion (VSEPR) Theory

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