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Solid State MCQs for MDCAT Practice

Chemistry section, Solid State chapter. Up to eight free sample questions, each with the correct answer and a worked explanation. The full chapter opens in the app.

The bank has 593 active questions on this chapter. Your first 500 practice attempts are free, and every attempt includes a worked explanation.

  1. Question 1
    The properties which depend upon the direction are called _____.
    • Isotropic properties
    • Anisotropy (correct answer)
    • Temperature
    • Sublimation
    Correct answer: B
    Anisotropy describes properties that vary with direction, distinguishing them from isotropic properties, temperature, and sublimation.
  2. Question 2
    The variation in physical properties of a crystal due to direction is called
    • isotropy
    • entropy
    • anisotropy (correct answer)
    • none of these
    Correct answer: C
    Crystals show directional dependence in properties like electrical conductivity and refractive index, a phenomenon termed anisotropy.
  3. Question 3
    A certain metal crystallizes in a face-centered cube measuring 4.00 × 102 picometers on each edge. What is the radius of the atom? (1 picometer (pm) = 1 × 10–12 meter)
    • 173 pm
    • 200. pm
    • 282 pm
    • 141 pm (correct answer)
    Correct answer: D
    Calculate atomic radius from edge length in a face-centered cubic (FCC) lattice, a key concept in solid-state chemistry.
  4. Question 4
    Which value would be required to estimate the lattice energy for the hypothetical ionic compound MgH?
    • The electron affinity of hydrogen (correct answer)
    • The first ionisation energy of hydrogen
    • The magnesium-hydrogen bond energy
    • The standard enthalpy changes of formation of MgH2
    Correct answer: A
    Estimating lattice energy for MgH requires understanding the Born-Haber cycle, specifically the electron affinity of the anion.
  5. Question 5
    Carbon dioxide is an example of?
    • Ionic Solid
    • Metallic Solid
    • Molecular Solid (correct answer)
    • Covalent Solid
    Correct answer: C
    CO2, composed of discrete molecules, solidifies into a molecular solid, not an ionic, metallic, or covalent network.
  6. Question 6
    The shape of the crystal in which it usually grows is called its _____.
    • Size
    • Capacity
    • Habit (correct answer)
    • Property
    Correct answer: C
    The term describing the characteristic external shape of a crystal is 'habit', distinguishing it from size, capacity, or general properties.
  7. Question 7
    The compound with most exothermic lattice energy is:
    • CaCl2
    • K2O
    • CaO (correct answer)
    • BaCl2
    Correct answer: C
    Lattice energy, most exothermic for the compound with highest ionic charge and smallest ionic radii, is highest for CaO due to Ca2+^{2+} and O2−^{2-} ions.
  8. Question 8
    Which of the following shows the effect of temperature on electrical conductivity in metals?
    • Temperature = High; Electrical Conductivity = Increases
    • Temperature = Low; Electrical Conductivity = Decreases
    • Temperature = High; Electrical Conductivity = Remains constant
    • Temperature = High; Electrical Conductivity = Decreases (correct answer)
    Correct answer: D
    Temperature increases cause increased lattice vibrations in metals, impeding electron flow and decreasing electrical conductivity.

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Read the full Solid State chapter notes: Solid State notes. Or browse every chapter.