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Microwaves

In which one ...

Question

In which one of the following regions of the electromagnetic specturm will the vibration motion of molecules give rise to absorption?

A

Ultraviolet

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B

Microwave

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C

Infrared

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D

Radio wave

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Solution

The correct option is B Microwave
Molecular spectra due to vibrational motion lies in the microwave region of electromagnetic spectrum. Due to Kirchhoff's law in spectroscopy the same will be absorbed.

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