wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Byju's Answer
Standard XII
Chemistry
Impurity defe...
Question

Impurity defect is the defect in which


A

Both cations and anions miss from their lattice sites creating voids.

No worries! We‘ve got your back. Try BYJU‘S free classes today!
B

Ions are replaced by different elements ions.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C

Anions occupy interstitial voids.

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

electrons occupy interstitial voids.

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B

Ions are replaced by different elements ions.


Impurity defect diagram.

In impurity defect as you see in diagram, the sodium ion is replaced by Strontium ion and balance the charge an anion miss from its lattice point.As the ion of one element is replaced by ion of other element, it is called impurity defect.


flag
Suggest Corrections
thumbs-up
0
similar_icon
Similar questions
Q.

Schottky defect is observed in crystals when .....................

(a) some cations move from their lattice site to interstitial sites

(b) equal number of cation and anions are missing from the lattice

(c) some lattice sites are occupied by electrons

(d) some impurity is present in the lattice

Q.

In which of the following structures coordination number for cations and anions in the packed structure will be same ?

(a) Cl− ions form fcc lattice and Na+ ions occupy all octahedral voids of the unit cell

(b) Ca2+ ions form fcc lattice and F− ions occupy all the eight tetrahedral voids of the unit cell

(c) O2− ions form fcc lattice and Na+ ions occupy all the eight tetrahedral voids of

(d) S2− ions form fcc lattice and Zn2+ ions go into alternate tetrahedral voids of the unit cell

Q. why in CaF2, F- ions occupy voids even though they are anions although anions are supposed to form close packed structures and cations are supposed to occupy voids?
Q. A solid made up of ions of A and B has an edge length of 0.564 nm has four formula units. Among the two ions, the smaller ones occupy the interstitial voids and the larger ions occupy the space lattice with ccp type of arrangement. The solid has a higher tendency to show Frenkel defects than Schottky defects. (Assume anions are in contact with each other)
The ionic radius of the positive ion is :
Q. Give the correct order of initials T (true) or F (False) for following statements:
I. In an anti-fluorite structure, anions form FCC lattice and cations occupy all tetrahedral voids.
II. If the radius of cations and anions are 0.2 ˚A and 0.95 ˚A, then co-ordination number of cation in the crystal is 4.
III. An ion is transferred from a lattice site to an interstitial position in Frenkel defect.
IV. Density of crystal always increases due to substitutional impurity defect.
View More
Join BYJU'S Learning Program
explore_more_icon
Explore more
Standard XII Chemistry
Join BYJU'S Learning Program
book_image
AI Tutor
book_image
Textbooks
book_image
Question Papers
book_image
Install app
CrossIcon