14. Which of the following statement is ..-阿摩線上測驗
14. Which of the following statement is correct?
(A) CO2 is a linear molecule and therefore there is no bending vibration.
(B) CO2 has 4 vibrational modes and all of them are IR-active.
(C) The frequency of the symmetric stretching vibration mode is lower than that of the
antisymmetric stretching mode for CO2.
(D) The point group of CO2 is C∞v.
(E) CO2is a well-known greenhouse gas, but N2 is not because it has no vibration.