Question

CO2 does not show its pure rotational spectrum but does show rotation vibration spectrum. give reason?​

Answer 1

Answer:

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Since homonuclear molecules such as dinitrogen (N2) have no dipole moment they have no rotation spectrum. Highly symmetric polyatomic molecules, such as carbon dioxide, also have no net dipole moment - the dipoles along the C-O bonds are always equal and opposite and cancel each other out.

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