Home
Class 12
CHEMISTRY
The flame colours of metal ions are du...

The flame colours of metal ions are due to

A

Frenkel defect

B

Schottky defect

C

Metal deficiency defect

D

Metal excess defect

Text Solution

Verified by Experts

Flame colours are due to metal excess defect. What happens that in some ionic crystals, there becomes an excess of metal atom, which by loosing `e^(-)` , change into ions. These electrons can absorb energy and go into excited states from ground state. Thus, the absorption of certain wavelength of light takes place and crystal becomes coloured according to complementary colour. The spaces occupied by extra are called F-centres.
Promotional Banner

Similar Questions

Explore conceptually related problems

The colours of lanthanide ions arise due to ______transition.

The colour of transition metal ions is due to

Transition metals normally have unfilled 'd' orbitals which are degenerate. The colour of transition metal ions is due to absorption of light in visible region. Which of the following transition is responsible for providing the colour?

Colour of transition metal ions are due to absorption of some wavelength. This results in

The colour of the transition metal ions is//are due to:

What is the colour of the flame when copper metal is burned on the flame?

The colour of the transition metal ions is due to

The colour of the transition metal ions is due to