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 gradually between 100°C and 150°C. Which is likely to be crystalline?
A student is given two samples: one is hard and brittle with a definite shape, the other is soft and can be molded. Which is likely to be amorphous?
Describe the difference in the arrangement of particles between crystalline and amorphous solids.
Explain why amorphous solids are called supercooled liquids.
Explain why crystalline solids are anisotropic.
A student heats two solids: one melts sharply at 801°C, the other softens gradually between 100°C and 150°C. Which is likely to be crystalline?
A student is given two samples: one is hard and brittle with a definite shape, the other is soft and can be molded. Which is likely to be amorphous?
A scientist finds that a solid sample, when cut, breaks into pieces with smooth, flat surfaces. What does this observation suggest about the type of solid, and why?
Which of the following best describes the melting behavior of amorphous solids?
(1) Sharp melting point
(2) Melts over a range of temperatures
(3) Does not melt
(4) Sublimes directly
Which of the following best describes the structure of an amorphous solid?
(1) Long-range order
(2) Short-range order
(3) Both long and short-range order
(4) No order at all
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 amorphous solids?
(1) Definite and sharp melting point
(2) Anisotropy
(3) Gradual softening on heating
(4) Regular arrangement of particles
Amorphous solids are also known as ______ solids.
Fill in the blank: Amorphous solids do not have a ______ arrangement of particles.
Fill in the blank: Crystalline solids are ______ in nature, while amorphous solids are isotropic.
Fill in the blank: The process of converting an amorphous solid into a crystalline solid by heating and cooling is called ______.
True or False: Amorphous solids are anisotropic in nature.
True or False: Amorphous solids can be molded and blown into various shapes.
True or False: Amorphous solids have a definite heat of fusion.
True or False: Amorphous solids have a regular and repeating arrangement of particles.
