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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- A. has a long range ordered arrangement of particles and a sharp melting point
- B. has no definite shape
- C. softens gradually over a range of temperature
- D. is always transparent
Explanation: In a crystal every particle occupies a regular repeating position, so all the bonds are identical and break at one definite temperature…
Correct answer: has a long range ordered arrangement of particles and a sharp melting point- A. isomorphism
- B. anisotropy
- C. polymorphism
- D. allotropy
Explanation: Because the arrangement of particles differs along different axes of a crystal, properties measured along those axes differ too, and this…
Correct answer: anisotropy3. Diamond and graphite are both made only of carbon atoms but have very different properties. They are
- A. isomers
- B. isotopes
- C. allotropes
- D. isomorphs
Explanation: Allotropes are different structural forms of the same element in the same physical state, and here diamond is a rigid three dimensional…
Correct answer: allotropes- A. polymorphic
- B. allotropic
- C. isomorphic
- D. anisotropic
Explanation: Isomorphous substances such as potassium sulphate and potassium chromate crystallise in the same shape because their ions are of similar…
Correct answer: isomorphic- A. each carbon forms four single covalent bonds
- B. the carbon atoms are ionised
- C. the layers are held by strong covalent bonds
- D. each carbon uses only three of its four valence electrons in bonding, leaving one delocalised
Explanation: In graphite each carbon is bonded to three others in a flat hexagonal sheet, and the fourth electron is delocalised between the layers, so…
Correct answer: each carbon uses only three of its four valence electrons in bonding, leaving one delocalised- A. the mass of its particles
- B. the strength of the forces holding its particles together
- C. the size of its crystals
- D. its electrical conductivity
Explanation: Melting requires enough thermal energy to overcome the forces locking the particles in the lattice, so covalent network and ionic solids…
Correct answer: the strength of the forces holding its particles together- A. Wood
- B. Gemstone
- C. Coke
- D. Graphite
Explanation: This is the option marked correct in the official UHS answer key. Graphite is crystalline with a strongly layered structure, so properties…
Correct answer: Graphite- A. Cement
- B. Ceramics
- C. Concrete
- D. Copper
Explanation: Copper is a metal whose atoms sit in a regular repeating lattice, so it is crystalline and melts at one sharp temperature.
Correct answer: Copper- A. diamond, wood
- B. glass, table salt
- C. wood, glass
- D. sucrose. glass
Explanation: Wood and glass are amorphous, or non-crystalline, solids because their particles lack a regular long-range arrangement.
Correct answer: wood, glass- A. reflection
- B. refraction
- C. dispersion
- D. all of the above
Explanation: Diamond appears brilliant because its high refractive index causes strong refraction and internal reflection, while dispersion separates…
Correct answer: all of the above- A. Decantation
- B. Sublimation
- C. Evaporation
- D. None
Explanation: Sublimation is the direct change of a solid into vapour without passing through the liquid state, as occurs with substances such as…
Correct answer: Sublimation- A. Sand and Iron Filing
- B. Sand and Naphthalene
- C. Both A & B
- D. None
Explanation: A mixture of sand and naphthalene can be separated by sublimation because naphthalene changes directly into vapour on heating while sand…
Correct answer: Sand and Naphthalene- A. Si2O3
- B. SiO2
- C. Al2O3
- D. Sr2O
Explanation: The main chemical constituent of ordinary sand is silicon dioxide, with the formula SiO2.
Correct answer: SiO2- A. Mother liquor
- B. Dilute solution
- C. Residue
- D. both A & B
Explanation: During crystallisation, the desired crystals separate from the solution while the remaining liquid retains dissolved solute and is called…
Correct answer: Mother liquor15. Gypsum is______?
- A. CaSO4
- B. CaSO4.1/2H2O
- C. CaSO4,2H2O
- D. CaSO4.3H2O
Explanation: Gypsum is hydrated calcium sulfate with two water molecules per formula unit, CaSO4·2H2O.
Correct answer: CaSO4,2H2O- A. Roasting
- B. Forth flotation
- C. Electrolysis
- D. Distillation
Explanation: Froth flotation concentrates sulphide ores by making the ore particles attach to bubbles and rise as froth, leaving much of the gangue…
Correct answer: Forth flotation- A. Annealing
- B. Quenching
- C. Tempering
- D. Nitriding
Explanation: Annealing involves heating steel and then cooling it slowly, allowing internal stresses to decrease and producing a softer, more workable…
Correct answer: Annealing- A. Silicon carbide
- B. Iron carbide
- C. Graphite
- D. Partly as iron carbide and partly as graphite
Explanation: In wrought iron, the small amount of carbon is conventionally described as being present mainly in combined form as iron carbide, Fe3C.
Correct answer: Iron carbide- A. Fe+Cr+Ni
- B. Fe+Ni+Cu
- C. Fe+ Cr+Cu
- D. Cu+C+Ni
Explanation: The conventional composition of stainless steel is iron alloyed with chromium and usually nickel; chromium forms a thin protective oxide…
Correct answer: Fe+Cr+Ni- A. Mother liquor
- B. Filterate
- C. Extract
- D. Molasses
Explanation: During sugar crystallization, the remaining concentrated syrup contains uncrystallized sugar and other dissolved substances and is called…
Correct answer: MolassesCrystalline Solids MCQs: common questions
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