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Classification of Substances (Grades 11-12)

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Classification of Substances

In which of the following states of matter would you find the strongest attractive forces?
  1. Solid
  2. Liquid
  3. Gas
In which of the following kinds of solids do we find valence electrons freely moving throughout the crystal?
  1. Metal
  2. Ionic
  3. Covalent
  4. Molecular
Which of the following types of compounds has the highest melting point?
  1. Metallic compounds
  2. Ionic compounds
  3. Covalent compounds
Which type of energy is released when an ionic solid is dissolved in water?
  1. Hydration energy
  2. Solvation energy
  3. Lattice energy
  4. Crystal energy
Which of the following ionic solids has a face-centered cubic (FCC) structure?
  1. Sodium Chloride
  2. Cesium Chloride
  3. Zinc Blende
  4. Fluorite
According to Coulomb's law, the energy between an ion pair is inversely proportional to which of the following parameters?
  1. Distance of separation (r)
  2. Electronic charge (e)
  3. Permittivity ([math]epsi_0[/math])
  4. Ion pair [math](Z^+Z^-)[/math][math][/math]
Which of the following covalent bonds is associated with lateral overlap of atomic orbitals?
  1. Sigma bond
  2. Pi bond
  3. Dative bond
Which of the following compounds has a linear shape?
  1. [math]BeF_2[/math]
  2. [math]BF_3[/math]
  3. [math]CH_4[/math]
  4. [math]SF_6[/math]
The process of mixing of different atomic orbitals belonging to the outermost energy level in an atom to give same number of new orbitals of usually equivalent energy is known as                                 .
According to VSEPR theory, what is the bond angle of compounds that are octahedral in shape?
  1. 180[math]deg[/math]
  2. 120[math]deg[/math]
  3. 90[math]deg[/math]
  4. 72[math]deg[/math]
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