Free Crystalline Solids MCQs with Answers

• 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.

• A. Glass.
• B. Diamond.
• C. Silica.
• D. Carbon.

Explanation: Glass is called a supercooled liquid because the molecules in the material are constantly in a state of flux. Glass is an Amorphous solid.

• A. Amorphous solids
• B. Crystalline solids
• C. Polymorphic solids
• D. Isomorphic solids

Explanation: An amorphous solid is any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern.

• A. Cooling
• B. Heating
• C. Impurity
• D. None of these

Explanation: Option C is correct since the presence of impurity due to its different electronic structure produces disturbance in the conduction…

• A. Solids
• B. Liquids
• C. Gases
• D. All of these

Explanation: Option A is correct since solids are closely packed through strong attractive forces.

• A. Chemical Properties
• B. Lattice Structure
• C. Physical Properties
• D. Density

Explanation: Option C is correct since some crystals show variation in physical properties depending upon their direction of cleavage.

• A. Zn
• B. Cd
• C. Ag
• D. Mn

Explanation: An isomorph is a compound or element that exhibits a similar crystal structure to another compound or element.

• A. Trigonal
• B. Orthorhombic
• C. Rhombohedral
• D. Tetragonal

Explanation: The correct answer is: cubic Above 128°C, potassium nitrate (KNO3) adopts a cubic crystal structure.

• A. Freezing point
• B. Melting point
• C. Boiling point
• D. None of these options are correct

Explanation: The transition temperature of allotropic forms of an element refers to the temperature at which the element undergoes a transformation…

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

Explanation: In the tetragonal system, two axes are of equal lengths and the third axe is either shorter or larger than the other two.

• A. 90 & 45
• B. 90 & 120
• C. 45 & 90
• D. 120 & 180

Explanation: In a rhombohedral or trigonal system, all the three axes are of an equal length like a cubic system but the three angles are not equal and…

• A. 2:2
• B. 1:2
• C. 2:1
• D. 1:4

Explanation: Ratio of silicon to oxygen atoms in silicon dioxide is 1:2 (SiO2).

• A. Gemstone
• B. Coal tar
• C. Glass
• D. Diamond

Explanation: Each carbon atom is covalently bonded to four other carbon atoms in diamond. A lot of energy is needed to separate the atoms.

• A. X-rays analysis
• B. Spectroscopic analysis
• C. Spectrometric analysis
• D. Combustlon analysis

Explanation: Crystal structure is explored through the diffraction of waves having a wavelength comparable with the interatomic spacing (10−10 m) in…

• A. Crystalline solids
• B. Pure solids
• C. True solids
• D. Amorphous solids

Explanation: Crystalline solids have definite heat of fusion, whereas amorphous solids have indefinite heat of fusion.

• A. Refractive Index
• B. Thermal conductivtiy
• C. Electrical conductivity
• D. Melting points

Explanation: d) Melting Points: Melting point is typically not considered an anisotropic property.

• A. Are isotopes
• B. Are isomers
• C. Are allotropes
• D. Have the same structure
• E. Are equally hard

Explanation: Diamond and Graphite are allotropes of carbon. The term allotrope refers to one or more physical forms of a chemical element that occurs…

• A. Glass
• B. Table salt
• C. Glue
• D. Rubber

Explanation: Table salt is a crystalline solid. It forms a well-defined crystal lattice structure where sodium (Na+) and chloride (Cl-) ions arrange…