NEETChemistrySolid State
What causes the yellow color in crystals of NaCl with the metal excess defect?
Options
- APresence of sodium atoms on the crystal surface
- BAbsorption of energy from visible light by F-centres
- CFormation of Cl₂ molecules
- DPresence of excess Cl⁻ ions
Correct answer
B. Absorption of energy from visible light by F-centres
Step-by-step solution
The yellow color in crystals of NaCl with the metal excess defect is due to the absorption of energy from visible light by F-centres.