Which of the following best describes the shape and polarity of the carbon disulphide molecule?
Correct answer: C. Linear and non-polar
- A. Bent and polar
- B. Pyramidal and polar
- C. Linear and non-polar
- D. Bent and non-polar
Explanation
The carbon disulfide (CS2) molecule has a linear shape and is nonpolar. Shape (Molecular Geometry): Carbon disulfide (CS2) consists of a carbon atom (C) double-bonded to two sulfur atoms (S). The arrangement of the atoms is linear, with a bond angle of 180 degrees. This linear shape is due to the linear arrangement of the two sulfur atoms around the central carbon atom. Polarity: Although the individual carbon-sulfur bonds in CS2 are polar (with sulfur being more electronegative than carbon), the linear molecular geometry of CS2 results in the two polar bonds canceling each other out. The bond dipoles in CS2 are in opposite directions and equal in magnitude, resulting in a nonpolar molecule overall. Therefore, CS2 is nonpolar.
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Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
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