Use VSEPR theory to predict the molecular geometry around either carbon atom in acetylene,C₂H₂. A) linear B) bent C) trigonal-planar D) tetrahedral E) octahedral

Question

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According to VSEPR theory, the molecular geometry is determined by the repulsion between electrons in the valence shell of the central atom. In acetylene, there are two carbon atoms bonded together with a triple bond. The triple bond consists of one sigma bond and two pi bonds. Each carbon atom also has one hydrogen atom attached to it.

Since there are only two atoms bonded to each carbon atom in acetylene, the electron pairs are as far apart as possible, resulting in a linear molecular geometry. Therefore, the correct choice is A) linear.

Use VSEPR Theory to Predict the Molecular Geometry Around Either