AIIMS 2019 Chemistry Hybridization and Geometry MCQ Question
The reaction of Ag⁺ with excess of sodium-thiosulphate is given below. Ag⁺ + Na₂S₂O₃ → [Ag(S₂O₃)₂]³⁻. This complex possesse charge. The coordination number for Ag is 2 which correspond to sp hybridization and linear geometry.
sp hybridization
sp² hybridization
sp³ hybridization
dsp² hybridization
Correct Answer
Detailed Explanation
The complex ion features silver (Ag) coordinated to two thiosulfate ligands (S₂O₃²⁻), resulting in a coordination number of 2. This arrangement leads to sp hybridization, which allows for linear geometry, as the two ligands are positioned 180° apart. Option A is incorrect because sp hybridization corresponds to a coordination number of 2, not sp², which is associated with a coordination number of 3 and trigonal planar geometry. Options C and D are also incorrect; sp³ hybridization corresponds to a tetrahedral geometry (coordination number 4), while dsp² hybridization is relevant for square planar complexes (coordination number 4 or 6).
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