Free Solids MCQs with Answers

• A. Atoms
• B. Ions
• C. Molecules
• D. All of these

Explanation: A crystal can be made up of atoms, ions, or molecules. The type of particles that make up a crystal depends on the substance that the…

• A. Isotrope
• B. Crystals
• C. Crystallite
• D. Bakelite

Explanation: OPTION A: Isotrope refers to a material that has the same physical properties in all directions.OPTION B: Crystals refer to a solid…

• A. Ores
• B. Crystalline Solids
• C. Amorphous Solids
• D. None of these options is correct

Explanation: Amorphous solids do not have a regular, ordered arrangement of atoms or molecules.

• A. Sedimentation
• B. Drying
• C. Heating
• D. Cooling

Explanation: Crystals are obtained from a saturated solution through cooling. When a saturated solution is cooled, the solute molecules can no longer…

• A. Compounds
• B. Molecules
• C. Ions
• D. Elements

Explanation: Allotropes are different structural forms of the same element and can exhibit quite different physical properties and chemical behaviours.

• A. Diamond
• B. Graphite
• C. Nail
• D. Iodine

Explanation: Option A: diamond does not conduct electricityOption B: In graphite each carbon is bonded to three other carbon atoms hence leaving behind…

• A. Bi
• B. Sn
• C. Fe
• D. Zn

Explanation: The tetragonal system is a crystal system in which the unit cell of the lattice is a right prism on a square base (a=b).

• A. Translational
• B. Vibrational
• C. Both Options A & B are correct
• D. None of these options are correct

Explanation: Solids are rigid in nature as the particles of solids are held in fixed positions and cannot move freely.

• A. Silicon carbide
• B. Diamond
• C. Both options A and B are correct
• D. None of these options are correct

Explanation: a) Silicon Carbide (SiC): Silicon carbide is a covalent crystal with a giant molecular structure.

• A. Cubic system
• B. Tetragonal system
• C. Triclinic system
• D. Hexagonal system

Explanation: Option A: In a cubic system, all three axes are of equal length and all are at right angles to each other.

• A. Isotropic
• B. Anisotropic
• C. Mesotrophic
• D. Neotropic

Explanation: An amorphous solid is isotropic, which means that its physical properties are identical in all directions.

• A. High density
• B. No free electron
• C. Tight structure
• D. Transparent to light

Explanation: Since each carbon atom is attached to the other four carbon atoms through strong covalent bonds.

• A. Atoms
• B. Molecules
• C. Ions
• D. All of these options are correct

Explanation: Crystalline solids are a three-dimensional collection of individual atoms, ions, or whole molecules organized in repeating patterns.

• A. Isomerism
• B. Allotropy
• C. Anistropy
• D. All of these options are correct

Explanation: Allotropy, or allotropism, is the property of some elements to exist in two or more different forms in the same physical state, known as…

• A. Sublimation
• B. Evaporation
• C. Abrupt cooling
• D. Hammering

Explanation: Many crystalline solids can be changed into amorphous solids by melting and then cooling the molten mass rapidly.

• A. Ruptured
• B. Changed
• C. Unchanged
• D. None of these

Explanation: Option C is correct as crystals have a 3D lattice structure that cannot be "changed" by turning a crystal into powder as the unit cell is…

• A. Simple microscopy
• B. MRI
• C. X-ray diffraction
• D. Projection of neutrons

Explanation: The crystal structure is determined by "X-ray diffraction". A beam of X-rays strikes the crystal, and the diffraction pattern is then used…

• A. Wax
• B. Plastic
• C. Glass
• D. All of these

Explanation: Wax, plastic, and glass are all amorphous solids. They do not have orderly arranged atoms.

• A. Allotropes
• B. Amorphous
• C. Isomorphous
• D. Polymorphous

Explanation: Polymorphous refers to substances that can exist in multiple crystal structures.

• A. Fixed
• B. Variable
• C. Have a range of value
• D. None of these

Explanation: Option A is correct since crystalline solids have a sharp melting point which is fixed.