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Questions and Answers
Which of the following statements is true about allotropic substances?
Which of the following statements is true about allotropic substances?
- They have the same melting point
- They have different stabilities (correct)
- They have the same crystalline form
- They have the same solubility
What is the term used to describe the conversion of a metastable form to a stable form of a polymorph?
What is the term used to describe the conversion of a metastable form to a stable form of a polymorph?
- Allotropy
- Spontaneous conversion (correct)
- Crystallization
- Supersaturation
Which of the following is NOT a characteristic of polymorphs?
Which of the following is NOT a characteristic of polymorphs?
- Different solubilities
- Different x-ray crystal and diffraction patterns
- Different covalent bond geometries (correct)
- Different melting points
Which of the following variables may affect the formation of polymorphs?
Which of the following variables may affect the formation of polymorphs?
What is the most common example of polymorphism?
What is the most common example of polymorphism?
Which of the following is NOT a characteristic of polymorphs?
Which of the following is NOT a characteristic of polymorphs?
What is the term used to describe the existence of more than one crystalline form of an elemental substance?
What is the term used to describe the existence of more than one crystalline form of an elemental substance?
Which of the following variables does NOT affect the formation of polymorphs?
Which of the following variables does NOT affect the formation of polymorphs?
Which of the following statements is true about allotropic substances?
Which of the following statements is true about allotropic substances?
What is the most common example of polymorphism mentioned in the text?
What is the most common example of polymorphism mentioned in the text?
Flashcards
What is allotropy?
What is allotropy?
The existence of more than one crystalline form of an elemental substance.
What are allotropic substances?
What are allotropic substances?
Substances of the same element with different structural forms; display different stabilities.
What is spontaneous conversion?
What is spontaneous conversion?
The changing of a metastable polymorph to a stable one without external influence.
What is polymorphism?
What is polymorphism?
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What affects polymorph formation?
What affects polymorph formation?
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Diamond and Graphite
Diamond and Graphite
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