Moderate

Which of the following has distorted tetrahedral structure?

Correct answer: B. AsH3

  • A. CCl4
  • B. AsH3
  • C. SiCl4
  • D. C2H2

Explanation

Arsine (AsH3) is a molecule containing one arsenic (As) atom and three hydrogen (H) atoms. It has a distorted tetrahedral structure due to the lone pair of electrons on the arsenic atom. This lone pair causes the hydrogen atoms to be pushed slightly closer together, resulting in a slight distortion from a perfect tetrahedral angle. AsH3 exhibits a pyramidal molecular geometry due to the influence of the lone pair.

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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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