Amorphous and Crystalline Solids
Chemistry ⇒ States of Matter
Amorphous and Crystalline Solids starts at 9 and continues till grade 12.
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A student heats two solids: one melts sharply at 801°C, the other softens over a range of 500–700°C. Identify which is likely crystalline and which is amorphous.
Describe how the melting behavior of amorphous solids differs from that of crystalline solids.
Describe the arrangement of particles in amorphous solids.
Explain the difference between isotropy and anisotropy with respect to solids.
Explain why amorphous solids are sometimes called supercooled liquids.
Explain why crystalline solids are anisotropic.
Explain why glass is considered an amorphous solid.
A student heats two solids: one melts sharply at 801°C, the other softens over a range of 500–700°C. Identify which is likely crystalline and which is amorphous.
Which of the following is a characteristic property of crystalline solids? (1) Definite melting point (2) Irregular shape (3) Isotropic nature (4) No long-range order
Which of the following is a property of crystalline solids but not of amorphous solids? (1) Isotropy (2) Definite melting point (3) Gradual softening (4) Irregular shape
Which of the following is an example of a crystalline solid? (1) Glass (2) Diamond (3) Rubber (4) Plastic
Which of the following is an example of an amorphous solid? (1) Table salt (2) Ice (3) Glass (4) Diamond
Amorphous solids are also known as ______ solids.
Fill in the blank: ______ solids are considered pseudo-solids.
Fill in the blank: ______ solids do not have a regular arrangement of their constituent particles.
Fill in the blank: The property of showing different values of physical properties in different directions is called ______.
State whether the following statement is true or false: Amorphous solids can be converted into crystalline solids by heating and then cooling slowly.
State whether the following statement is true or false: Amorphous solids have a definite enthalpy of fusion.
State whether the following statement is true or false: Amorphous solids have a regular arrangement of constituent particles.
True or False: Amorphous solids soften gradually over a range of temperatures.
