Assertion: The anionic site occupied by unpaired electrons are called F-centres.Reason: F-centres are produced as a result of metal excess defect due to anion vacancies.
Assertion and reason both are correct statements and reason is the correct explanation for assertion.
Assertion and reason both are correct statements and reason is not the correct explanation for assertion.
Assertion is correct statement but reason is wrong statement.
Assertion is a wrong statement but reason is a correct statement.
Answers
Answer:
Assertion and reason both are correct statements and reason is the correct explanation for assertion.
Answer:
The correct answer to the question-"Assertion: The anionic site occupied by unpaired electrons are called F-centres.Reason: F-centres are produced as a result of metal excess defect due to anion vacancies. " is-
Both are correct.
Explanation:
Assertion and reason both are correct statements and reason is the correct explanation for assertion.
Since, for example-
NaCl shows the metal excess defect, which in results form an F-center in the crystal. When light falls on this crystal, the electron in F-center becomes excited. This F-center is responsible for the yellow (X) color of NaCl.
Same is the case with, potassium and lithium.
Here,The excess of potassium imparts violet/lilac (Z) colour of KCl crystals.
Therefore, the assertion -Assertion: The anionic site occupied by unpaired electrons are called F-centres.
And the ,reason- F-centres are produced as a result of metal excess defect due to anion vacancies.
are correct.
To know more about anionic site, click on the link below-
https://brainly.in/question/11423640
To know more about metal excess deffect , click on the link below-
https://brainly.in/question/11764371