Amorphous and Crystalline Solids
Chemistry ⇒ States of Matter
Amorphous and Crystalline Solids starts at 9 and continues till grade 12.
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Define the term 'isotropy' as it relates to solids.
Describe the arrangement of particles in a crystalline solid.
Describe the difference between isotropy and anisotropy with respect to solids.
Describe the difference in the external appearance of crystalline and amorphous solids.
Explain the term 'conchoidal fracture' with respect to amorphous solids.
Explain why amorphous solids are sometimes called supercooled liquids.
Explain why amorphous solids do not have a definite heat of fusion.
A scientist is analyzing two solid samples. Sample A shows a sharp melting point and a regular geometric shape, while Sample B softens gradually over a range of temperatures and has an irregular shape. Based on these observations, classify each sample as crystalline or amorphous and justify your answer.
Which of the following best describes the structure of amorphous solids?
(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 correct statement about crystalline solids?
(1) They are isotropic
(2) They have irregular shapes
(3) They have a definite and regular arrangement of particles
(4) They do not have a definite heat of fusion
Which of the following is a property of amorphous solids?
(1) Definite and sharp melting point
(2) Isotropy
(3) Long-range order
(4) Definite heat of fusion
Amorphous solids are also known as ________ solids.
Crystalline solids have a ________ arrangement of their constituent particles.
Fill in the blank: Amorphous solids lack ________ order in the arrangement of their particles.
Fill in the blank: Crystalline solids are ________ in nature, meaning their properties vary with direction.
State whether the following statement is true or false: 'Plastic is an example of an amorphous solid.'
True or False: Amorphous solids are considered true solids.
True or False: Amorphous solids can be converted into crystalline solids by heating and slow cooling.
True or False: Amorphous solids can be molded by heating.
