Free Solids MCQs with Answers
357 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.
Solids are classified by particle arrangement and bonding into crystalline, ionic and molecular forms. Questions cover crystal lattices, the shapes and properties of ionic crystals, and lattice energy, including how ion charge and ionic size affect the strength of attractions within an ionic solid.
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Read the Solids notesFree MDCAT chapter notes with key terms357 questions · page 2 of 18
- 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. a and b
- B. b and c
- C. c and a
- D. Not specified
Explanation: By convention the three interfacial angles of a unit cell are alpha between the b and c axes, beta between c and a, and gamma between a…
Correct answer: c and a- 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. Longitudinal wave
- B. Elastic wave
- C. Transverse wave
- D. Electromagnetic wave
Explanation: A phonon is the quantum of vibrational energy associated with an elastic wave or lattice vibration in a solid.
Correct answer: Elastic wave- A. ABAB (hexagonal)
- B. ABCABC (Cubic)
- C. Orthor hombic
- D. Rhombohedral
Explanation: If the third layer lies directly above the first, the stacking sequence repeats as A-B-A-B, which is the hexagonal close-packed…
Correct answer: ABAB (hexagonal)- 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 liquor32. 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: Molasses- A. Coloured solid
- B. Brittle
- C. Hard
- D. All of above
Explanation: Pure quartz is colourless, hard, and brittle, so “coloured solid” is not normally a property of pure quartz; colour usually comes from…
Correct answer: Coloured solid- A. 4
- B. 2
- C. 1
- D. 6
Explanation: In the silica network, each silicon atom forms four Si-O covalent bonds arranged tetrahedrally, so it is surrounded by 4 oxygen atoms.
Correct answer: 4- A. Absorbs moisture and remains solid
- B. Absorbs moisture and turns to liquid form
- C. Loses water of crystallization
- D. Increases the number of water of crystallization
Explanation: A deliquescent solid absorbs water vapour from the air until it dissolves in the absorbed water and becomes liquid.
Correct answer: Absorbs moisture and turns to liquid form