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Free Shape of Ionic Crystals MCQs with Answers

30 Shape of Ionic Crystals MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

Ionic crystal shape depends on the regular arrangement of oppositely charged ions in a three-dimensional lattice. The topic covers coordination number, radius ratios, lattice geometry and structures such as sodium chloride, caesium chloride and zinc sulfide, which should not be confused with the molecular shapes predicted by VSEPR theory.

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30 questions · page 2 of 2

21. Predict the shape of CsCl having a radius ratio of 0.93:

  • A. Tetrahedral
  • B. Octahedral
  • C. Body-centered cubic
  • D. Hexagonal

Explanation: CsCl adopts a body-centered cubic (bcc) arrangement where each Cs⁺ ion is surrounded by 8 Cl⁻ ions and vice versa, giving a coordination…

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Correct answer: Body-centered cubic

22. Which statement correctly describes the structure of sodium chloride crystal?

  • A. Each sodium ion is surrounded by six chloride ions and each chloride ions surrounded by six sodium ions
  • B. The crystal is face centered cubic structure
  • C. Each sodium ion is surrounded by 3 chloride ions and each chloride ion surrounded by 3 sodium ions
  • D. Inter molecular forces are present between two oppositely charges ions

Explanation: Explanation for this question will be added soon.

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Correct answer: Each sodium ion is surrounded by six chloride ions and each chloride ions surrounded by six sodium ions

23. Co-ordination number of Na is:

  • A. 10
  • B. 9
  • C. 8
  • D. 12

Explanation: The actual coordination number is 6 but the closest one here is 8

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Correct answer: 8

24. Chloride ions in NaCl are placed at the corner of a regular:

  • A. Pentagon
  • B. Cuboid
  • C. Octahedron
  • D. Cube

Explanation: Chloride ions are placed in a CCP type of arrangement. It contains chloride ions at the corner and the center of the cube.

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Correct answer: Octahedron

25. Definite Shape of NaCl crystal is its_.

  • A. Characteristic
  • B. Symmetry
  • C. Habit
  • D. All of these

Explanation: Crystal habit is the characteristic external shape of an individual crystal or crystal group.

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Correct answer: Habit

26. The ionic radius of an ion is the radius of the ion while considering it to be_in shape.

  • A. Oval
  • B. Round
  • C. Rectangular
  • D. Spherical

Explanation: The ionic radius of an ion is the radius of the ion when it is considered to be a sphere.

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Correct answer: Spherical

27. The atomic ratio of isomorphs of ZnSO4, and NiSO4 is _.

  • A. 2:1
  • B. 2:1:4
  • C. 1:1:4
  • D. 1:1

Explanation: The term isomorph means when two different substances have the same crystalline shape.

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Correct answer: 1:1:4

28. In the structure of NaCl, each Na+ is surrounded by _ Cl- ions.

  • A. Four
  • B. Eight
  • C. Five
  • D. Six

Explanation: A is incorrect as 6 electrons are present around each Na+ in a NaCl structure.B is incorrect as 6 electrons are present around each Na+ in…

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Correct answer: Six

29. The coordination number of Na+ in NaCl crystal is:

  • A. 6
  • B. 2
  • C. 4
  • D. 8

Explanation: The coordination number is the number of ions that immediately surround an ion of the opposite charge within a crystal lattice.

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Correct answer: 6

30. Coordination number of an ion in:

  • A. 4
  • B. 6
  • C. 8
  • D. 2

Explanation: The coordination number of an ion refers to the number of ions or atoms that surround and are bonded to the central ion in a compound.

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Correct answer: 4
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