Column I | Column II | |
A. B. C. | Impurity defect Metal excess defect Metal deficiency defect | 1. NaCl with anionic sites called F-centres 2. Fed with Fe3+ 3. NaCI with Sr2+ and some cationic sites vacant |
Answer:
A.® (3) B.®
(1) C.® (2)
A. Impurity defect arises due to
replacement of one common ion present in any crystal by another uncommon ion.
B. Metal excess defect is due to
missing of cation from ideal ionic solid which lead to create a F-centre
generally occupied by unpaired electrons, e.g., NaCI with anionic site.
C. Metal deficiency defect In
FeO, Fe3'1' exists along with Fe2''' which lead to decrease in metal ion(s) so
this is a type of metal deficiency defect.
You need to login to perform this action.
You will be redirected in
3 sec