Which of the statements is incorrect
Correct answer: C. When bond length is less than 75.4 pm, energy of molecules decreases
- A. Bond length of H₂ is 75.4 pm
- B. Energy released in the formation of H₂ is 436.45 kJ mol⁻¹
- C. When bond length is less than 75.4 pm, energy of molecules decreases
- D. When bond length is less than 75.4 pm, energy of molecules increases
Explanation
When bond length is less than 75.4 pm, energy of molecules decreases - Incorrect. If bond length decreases beyond the optimal distance (75.4 pm), repulsive forces between nuclei increase, raising the energy instead of decreasing it.
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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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