JEE Main 202126 AugustMorning Shift
- Exam
- JEE Main
- Year
- 2021
- Date
- 26 August
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Solid State
JEE Main 2021 · 26 August · Morning Shift · Chemistry · Solid State
Given below are two statements: Statement I : Frenkel defects are...
Given below are two statements:
Statement I : Frenkel defects are vacancy as well as interstitial defects.
Statement II : Frenkel defect leads to colour in ionic solids due to presence of F-centres.
Choose the most appropriate answer for the statements from the options given below:
Options
- AStatement I is false but Statement II is true
- BBoth Statement I and Statement II are false
- CStatement I is true but Statement II is false
- DBoth Statement I and Statement II are true
Correct answer
C. Statement I is true but Statement II is false
Step-by-step solution
A Frenkel defect is another form of a point defect which is created when an atom or cation leaves its original place in the lattice structure to create a vacancy while occupying another interstitial position within the solid crystal. Frenkel defect is dislocation defect, it is not interstitial defect, and it is not responsible for colour of solid.