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Lesson: Molecular, Network, Ionic, and Metallic Solids

Worksheet • 15 Questions

Q1:

Which of the following statements concerning amorphous solids is false?

  • AUnlike crystalline solids, amorphous solids lack a repeating unit cell, leading to a random organization of atoms.
  • BUnlike crystalline solids, amorphous solids tend to lose structural organization as their lattices extend.
  • CThe formation of amorphous solids is aided by the rapid cooling of a molten compound.
  • DAmorphous solids are said to behave as supercooled liquids, leading to an ease in transitioning between physical states.

Q2:

Why does an amorphous solid typically melt over a wide range of temperatures?

  • AThere is a large amount of variation in the strength of intermolecular interactions throughout the material.
  • BThe melting temperature depends on the solvent content, which decreases slowly as the material is heated.
  • CA solid-solid phase transition results in a crystalline material with a higher melting temperature.
  • DHeating causes the material to decompose, altering its melting temperature.
  • EThe material contains a mixture of compounds with different melting temperatures.

Q3:

Which of the following quantities is larger in diamond than in graphite?

  • ACovalent bond length
  • BThermodynamic stability at 1 atm and 298 K
  • CBond angle
  • DReactivity with hydrogen
  • EElectrical conductivity

Q4:

Which of the following properties is most likely to indicate that a material is non-metallic?

  • AWhite
  • BLow melting point
  • CBrittle
  • DReacts with water
  • ESoft

Q5:

Which of the following terms best describes the most stable solid form of oxygen?

  • AMolecular crystal
  • BAmorphous solid
  • CIonic lattice
  • DCovalent network
  • EMetal

Q6:

A solid is shiny, soft and brownish silver in color. The material is electrically conductive and has a melting point of 2 7 2 C . Which term best describes the structure of the material?

  • AMetal
  • BSalt
  • CAmorphous solid
  • DMolecular crystal
  • ECovalent network

Q7:

Which of the following is not a typical property of metals?

  • AHigh aqueous solubility
  • BHigh melting point
  • CHigh ductility
  • DHigh electrical conductivity
  • EHigh malleability

Q8:

Which of the following is an ionic solid at room temperature and pressure?

  • A N H N O 4 3
  • B H C l
  • C S i O 2
  • DGraphite
  • E F e

Q9:

A solid is soft, black, shiny and insoluble in water. The material is electrically conductive and sublimes at 3 6 4 2 C . Which term best describes the structure of the material?

  • ACovalent network
  • BSalt
  • CAmorphous solid
  • DMolecular crystal
  • EMetal

Q10:

A solid is shiny, malleable and insoluble in water. The material is highly electrically conductive and has a melting point of 1 1 0 0 C . Which term best describes the structure of the material?

  • AMetal
  • BSalt
  • CAmorphous solid
  • DMolecular crystal
  • ECovalent network

Q11:

A solid is shiny, soft and silvery blue in colour. The material is electrically conductive and has a melting point of 3 0 C . Which term best describes the structure of the material?

  • AMetal
  • BSalt
  • CAmorphous solid
  • DMolecular crystal
  • ECovalent network

Q12:

A solid is brittle, white and soluble in water. The melting point of the material is 8 0 0 C and it is electrically conductive only if melted or dissolved. Which term best describes the structure of the material?

  • ASalt
  • BAmorphous solid
  • CMetal
  • DMolecular crystal
  • ECovalent network

Q13:

Which of the following best describes the structure of paraffin wax?

  • AAmorphous solid
  • BMolecular crystal
  • CIonic lattice
  • DCovalent network
  • EMetal

Q14:

A solid is hard, colorless and insoluble in water. The material is an electrical insulator and has a melting point of 3 5 5 0 C . Which term best describes the structure of the material?

  • ACovalent network
  • BSalt
  • CAmorphous solid
  • DMolecular crystal
  • EMetal

Q15:

Which of the following is a covalent network solid at room temperature and pressure?

  • A S i C
  • B C H C H C H C H 3 2 2 3
  • C N 2
  • D K P O 3 4
  • E C a C l 2
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