Solid State Quiz - CBSE Class 11 Science

Free practice quiz: Solid State (CBSE Class 11 Science). 19 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. Which of the following is NOT a characteristic of a crystalline solid?

   1. Long-range order
   2. Sharp melting point
   3. Isotropic properties
   4. Definite geometrical shape
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   Answer: C. Isotropic properties

   Crystalline solids exhibit anisotropic properties, meaning their properties vary with direction. Isotropic materials have the same properties in all directions.

2. Explain the difference between amorphous and crystalline solids.

   1. Amorphous solids have a definite melting point, crystalline solids don't
   2. Crystalline solids have a long range order, amorphous solids don't
   3. Amorphous solids are always transparent, crystalline solids are opaque
   4. Amorphous solids are harder than crystalline solids
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   Answer: B. Crystalline solids have a long range order, amorphous solids don't

   Crystalline solids possess a well-defined, ordered arrangement of constituent particles, while amorphous solids lack this long-range order.

3. Explain the concept of voids in a crystal lattice.

   1. Empty spaces between constituent particles
   2. Points where crystal lattice is distorted
   3. Regions where atoms are compressed
   4. Regions with increased density
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   Answer: A. Empty spaces between constituent particles

   Voids are the empty spaces between atoms in a crystal structure.

4. How does the radius ratio affect the coordination number?

   1. Larger radius ratio leads to higher coordination number
   2. Smaller radius ratio leads to higher coordination number
   3. No relationship exists between radius ratio and coordination number
   4. It depends on the type of unit cell
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   Answer: A. Larger radius ratio leads to higher coordination number

   A larger radius ratio allows more anions to surround a cation.

5. Explain the concept of doping in semiconductors.

   1. Introduction of impurities to enhance conductivity
   2. Removal of impurities to decrease conductivity
   3. Process to increase the melting point
   4. A method to reduce the crystal size
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   Answer: A. Introduction of impurities to enhance conductivity

   Doping introduces impurities to alter the electrical conductivity of a semiconductor.

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