When pure is heated in an atmosphere of sodium vapor, the crystal acquires a yellow color. This phenomenon is driven by:

Name: JEE Advanced Chemistry
Price: 7999 INR
Availability: InStock

Question

When pure $NaCl$ is heated in an atmosphere of sodium vapor, the crystal acquires a yellow color. This phenomenon is driven by:

Prashant Kotian · Accepted Answer

Correct answer: C. Heating in sodium vapour creates anion vacancies. Electrons occupy these chloride-ion vacancies to form F-centres. These trapped electrons absorb visible light, giving the crystal a yellow colour.

💡 Solution & Explanation

Practice 22,000+ questions like this