Coloured complexes absorb radiations in the _________.

visible region

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infrared region

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ultraviolet region

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far infrared

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Solution

The correct option is A visible region
In the complexes when the d-level is not completely filled, it is possible to promote an electron from a lower energy d-orbital to a higher energy d-orbital by absorption of a photon of electromagnetic radiation having an appropriate energy. Electromagnetic radiations in the visible region of the spectrum often possess the appropriate energy for such transitions.

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Similar questions

A radiation P is focused by a proper device on the bulb of a thermometer. Mercury in the thermometer shows a rapid increase. The radiation P is :

(a) infrared radiation

(b) visible light

(d) X -rays.

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