Free Crystalline Solids MCQs with Answers
184 Crystalline Solids MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Crystalline solids contain particles arranged in a regular repeating lattice described by a unit cell. Their study includes coordination number, packing efficiency, density, anisotropy, cleavage, polymorphism and common crystal systems, along with ionic, molecular, covalent network and metallic crystals. Crystalline order differs from the random arrangement of amorphous solids.
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184 questions · page 4 of 10
- A. Aluminium chloride
- B. Ice
- C. Magnesium oxide
- D. Silicon (IV) oxide
- E. Sodium chloride
Explanation: SiO2 has a macromolecular structure only among the compounds above. While other compounds possess a simple molecular structure, hence D is…
Correct answer: Silicon (IV) oxide- A. a=b≠c ; α=β=γ=90
- B. a≠b≠c ; α=γ=90 ; β≠90
- C. a=b≠c ; α=β=90; γ≠90
- D. a=b=c ; α=β=γ=90
Explanation: According to the crystal systems in the table given below, option B is correct.
Correct answer: a≠b≠c ; α=γ=90 ; β≠90- A. They possess symmetry
- B. They are isotropic
- C. They are anisotropic
- D. They cleave along a particular direction
- E. They have a definite shape
Explanation: Amorphous solids are isotropic because they show thermal and optical properties, same in all directions.
Correct answer: They are isotropic64. Glass is a/an:
- A. Pure solid
- B. Supercooled liquid
- C. Mixture of sodium and calcium
- D. The crystalline form of Na2CO3
- E. Alloy
Explanation: Glass is sometimes called a supercooled liquid because it does not form a crystalline structure, but instead forms an amorphous solid that…
Correct answer: Supercooled liquid- A. Iodine crystal
- B. Solid CO2
- C. Silica
- D. White phosphorus
Explanation: Silica tends to form long-chain covalent structures such as carbon so it has a giant covalent structure.
Correct answer: Silica- A. Cubic
- B. Tetragonal
- C. Monoclinic
- D. Hexagonal
Explanation: A tetragonal unit cell has two equal dimensions (a = b ≠ c) and all angles equal to 90 degrees (α = β = γ = 90°).
Correct answer: Tetragonal- A. In most stable geometric form
- B. Solid and liquid state
- C. In dynamic equilibrium between two crystalline forms
- D. In one solid geometrical form only
Explanation: Option C is correct because, from the thermodynamic standpoint, the transition temperature can be characterized by the temperature, T0, at…
Correct answer: In dynamic equilibrium between two crystalline forms- A. transition
- B. crack transition
- C. glass transition
- D. all of these
Explanation: The glass-liquid transition, or glass transition, is the gradual and reversible transition in amorphous materials (or in amorphous regions…
Correct answer: glass transition- A. isotropy
- B. entropy
- C. anisotropy
- D. none of these
Explanation: Anisotropy is the property of a material that allows it to change or assume different properties in different directions, as opposed to…
Correct answer: anisotropy- A. Loosely Packed
- B. In random motion
- C. Excited
- D. Closely packed
Explanation: Atoms in solids are closely packed together, thus solids maintain rigid shapes.
Correct answer: Closely packed- A. Critical
- B. Absolute
- C. Transition
- D. None of these options is correct
Explanation: Option A: The critical temperature refers to the temperature above which a substance cannot exist as a liquid, regardless of the pressure.
Correct answer: Transition- A. They are isotropic
- B. They are rigid and incompressible
- C. They melt over a wide range of temperatures.
- D. There is no orderly arrangement of particles
Explanation: In amorphous solids, the arrangement of particles is irregular in all directions; hence, the value of any physical property is the same in…
Correct answer: They are rigid and incompressible- A. Translational motion
- B. Vibrational motion
- C. Rotational motion
- D. Linear motion
Explanation: The correct option is B. Solid has a fixed shape and a fixed volume because the particles can move only a little.
Correct answer: Vibrational motion- A. Size
- B. Capacity
- C. Habit
- D. Property
Explanation: The correct option is C. The Habit of a crystal is defined as the shape of the crystal in which it usually grows.
Correct answer: Habit- A. Ionic solids
- B. Molecular solids
- C. Amorphous solids
- D. Metallic solids
Explanation: The correct option is C. Amorphous solids are isotropic. That is, they exhibit uniform properties in all directions.
Correct answer: Amorphous solids- A. Metallic
- B. Covalent
- C. Molecular
- D. Ionic
Explanation: Quartz or Silica has the molecular formula SiO2. Each Si atom is covalently bonded to 4 O atoms, but every O atom is shared between two Si…
Correct answer: Covalent- A. Isotropic properties
- B. Anisotropy
- C. Temperature
- D. Sublimation
Explanation: Anisotropic properties are the properties that exhibit different values when measured along with different directions.
Correct answer: Anisotropy- A. 13.2°C
- B. 123°C
- C. 12.3°C
- D. 32.38°C
Explanation: The temperature at which the allotropic forms of a substance exists in equilibrium is called transition temperature.At atmospheric…
Correct answer: 123°C- A. Zn
- B. CaSO4
- C. Na
- D. AgNO3
Explanation: AgNO3 is the only example of a polymorph among the options provided. Polymorphism is the ability of a substance to crystallize into…
Correct answer: AgNO3- A. Monoclinic S and Rhombic S
- B. Rhombic S
- C. Triclinic S
- D. Monoclinic S
Explanation: Allotropy is the existence of an element in more than one crystalline forms. These forms are known as allotropes.
Correct answer: Monoclinic S and Rhombic S