Welcome to the Solids MDCAT MCQs with Answers. In this post, we have shared Solids Multiple Choice Questions and Answers for PMC MDCAT 2024. Each question in MDCAT Chemistry offers a chance to enhance your knowledge regarding Solids MCQs in this MDCAT Online Test.
Which type of solid is characterized by high melting points and poor electrical conductivity?
a) Metallic solids
b) Ionic solids
c) Covalent network solids
d) Molecular solids
In which of the following solids are the atoms, ions, or molecules arranged in a highly ordered structure?
a) Amorphous solids
b) Crystalline solids
c) Glass
d) Polymer solids
Which solid type is typically formed by the condensation of gas at low temperatures?
a) Metallic solids
b) Ionic solids
c) Molecular solids
d) Covalent network solids
The coordination number of an ion in a crystal lattice refers to:
a) The number of neighboring atoms
b) The number of electrons
c) The number of protons
d) The number of neutrons
What type of crystal structure does sodium chloride (NaCl) have?
a) Face-centered cubic
b) Body-centered cubic
c) Hexagonal close-packed
d) Tetragonal
Which of the following is a property of ionic solids?
a) High electrical conductivity
b) High melting and boiling points
c) High malleability
d) Low melting and boiling points
In which type of solid are the bonding electrons delocalized?
a) Ionic solids
b) Covalent network solids
c) Metallic solids
d) Molecular solids
Diamond is an example of which type of solid?
a) Metallic solid
b) Molecular solid
c) Ionic solid
d) Covalent network solid
Which of the following solids is best described as being hard, brittle, and having a high melting point?
a) Molecular solid
b) Metallic solid
c) Ionic solid
d) Amorphous solid
The crystal structure of copper is best described as:
a) Body-centered cubic
b) Face-centered cubic
c) Hexagonal close-packed
d) Simple cubic
Which of the following is true about amorphous solids?
a) They have sharp melting points
b) They have a well-defined crystal structure
c) They are isotropic
d) They are anisotropic
What is the primary force holding together molecular solids?
a) Covalent bonds
b) Ionic bonds
c) Van der Waals forces
d) Metallic bonds
Which property is not typically associated with metallic solids?
a) High thermal conductivity
b) Malleability
c) High melting point
d) Brittleness
Graphite is a good conductor of electricity due to:
a) Ionic bonding
b) Covalent bonding
c) Delocalized π-electrons
d) Metallic bonding
Which of the following solids exhibits the phenomenon of sublimation?
a) NaCl
b) Ice
c) Dry ice (solid CO2)
d) Diamond
Which type of defect is characterized by the missing of atoms in a crystal lattice?
a) Frenkel defect
b) Schottky defect
c) Substitutional defect
d) Interstitial defect
Which of the following is not an example of an ionic solid?
a) NaCl
b) MgO
c) C60 (Fullerene)
d) CaF2
Which of the following describes the structure of a covalent network solid?
a) Atoms bonded together in a 3D network
b) Ions held together by electrostatic forces
c) Molecules held together by van der Waals forces
d) Atoms arranged in a metallic lattice
In a metal, the positive ions are surrounded by a sea of:
a) Neutrons
b) Protons
c) Electrons
d) Photons
The packing efficiency is highest in which type of crystal lattice?
a) Simple cubic
b) Body-centered cubic
c) Face-centered cubic
d) Hexagonal close-packed
Which of the following solids is likely to have the lowest melting point?
a) Sodium chloride
b) Ice
c) Diamond
d) Copper
Which type of solid is an insulator in its solid state but conducts electricity when molten?
a) Molecular solid
b) Covalent network solid
c) Ionic solid
d) Metallic solid
Which of the following solids is amorphous?
a) Quartz
b) Diamond
c) Graphite
d) Glass
Which of the following is an example of a molecular solid?
a) Sodium chloride
b) Ice
c) Diamond
d) Magnesium oxide
Which of the following properties is unique to amorphous solids?
a) Sharp melting point
b) Long-range order
c) Isotropy
d) High density
What is the structure of a body-centered cubic (BCC) lattice?
a) Atoms at each corner of a cube
b) Atoms at each corner and in the center of the cube
c) Atoms at each face of the cube
d) Atoms at the center of each edge of the cube
Which of the following solids has the lowest density?
a) Diamond
b) Lead
c) Ice
d) Iron
The phenomenon where a solid changes directly into a gas is called:
a) Fusion
b) Vaporization
c) Sublimation
d) Condensation
Which type of solid is formed by covalent bonding throughout the entire structure?
a) Ionic solid
b) Molecular solid
c) Metallic solid
d) Covalent network solid
Which of the following has a simple cubic crystal structure?
a) Copper
b) Sodium chloride
c) Polonium
d) Magnesium
In which of the following solids does electrical conductivity increase with temperature?
a) Metals
b) Ionic solids
c) Semiconductors
d) Superconductors
Which solid structure is characterized by hexagonal layers of atoms?
a) Body-centered cubic
b) Face-centered cubic
c) Hexagonal close-packed
d) Simple cubic
What type of solid is butter classified as?
a) Amorphous solid
b) Crystalline solid
c) Covalent network solid
d) Metallic solid
Which of the following solids has the highest thermal conductivity?
a) Diamond
b) Silicon
c) Glass
d) Rubber
Which crystal defect involves the replacement of one atom by another of similar size?
a) Schottky defect
b) Frenkel defect
c) Substitutional defect
d) Interstitial defect
Which of the following is an example of a van der Waals solid?
a) NaCl
b) Diamond
c) Graphite
d) Iodine
The phenomenon where certain solids emit light when heated is called:
a) Phosphorescence
b) Fluorescence
c) Incandescence
d) Bioluminescence
Which of the following solids is considered to be isotropic?
a) Quartz
b) Diamond
c) Amorphous solids
d) Graphite
What is the typical coordination number for a simple cubic lattice?
a) 4
b) 6
c) 8
d) 12
Which of the following is a property of superconductors?
a) High electrical resistance
b) Zero electrical resistance
c) High thermal conductivity
d) Low thermal conductivity
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