Selected MCQ

Current Question
Which crystal defect preserves stoichiometry in ionic solids?
  • A. Frenkel defect
  • B. Metal excess defect only
  • C. Metal deficiency defect only
  • D. Substitutional alloying
Correct Answer: A
Explanation:
In a Frenkel defect an ion shifts position without changing overall composition.
Related Question 1
Which bond has partial ionic character?
  • A. Nonpolar covalent
  • B. Polar covalent
  • C. Metallic
  • D. Hydrogen
Correct Answer: B
Explanation:
Polar covalent bonds share electrons unequally.
Related Question 2
The entropy at absolute zero for perfect crystal is:
  • A. Maximum
  • B. Infinite
  • C. Zero
  • D. Undefined
Correct Answer: C
Explanation:
Third law states entropy approaches zero.
Related Question 3
Which complex exhibits highest crystal field splitting?
  • A. Tetrahedral
  • B. Octahedral
  • C. Square planar
  • D. Linear
Correct Answer: C
Explanation:
Square planar has largest splitting in many cases.