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Classification of Substances (Grades 11-12)

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Classification of Substances

1. 
In which of the following states of matter would you find the strongest attractive forces?
  1. Solid
  2. Liquid
  3. Gas
 
2. 
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
3. 
Which of the following types of compounds have the highest melting point?
  1. Metallic compounds
  2. Ionic compounds
  3. Covalent compounds
 
4. 
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
5. 
Which of the following ionic solid has face-centered cubic (FCC) structure?
  1. Sodium Chloride
  2. Cesium Chloride
  3. Zinc Blende
  4. Fluorite
 
6. 
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]
7. 
Which of the following covalent bonds is associated with lateral overlap of atomic orbitals?
  1. Sigma bond
  2. Pi bond
  3. Dative bond
 
8. 
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]
9. 
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                                 .
 
10. 
According to VSEPR theory, what is the bond angle of compounds which 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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