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Silicate Ceramics and Crystal Structures

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Silicate Ceramics and Crystal Structures

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Questions and Answers

Which of the following is the basic unit of silicates?

Silica

Quartz

Cristobalite

SiO44- tetrahedron (correct)

Which of the following is NOT a primary polymorphic crystalline form of silica?

Silica (correct)

Cristobalite

Quartz

Tridymite

Which of the following is true about silica glasses?

They have a low density

They have a high melting point

They are formed by adding CaO and Na2O to silica

They are noncrystalline (correct)

What is the chemical formula for silica?

SiO2 Signup and view all the answers

What type of bonds are present in silica ceramics?

Covalent bonds Signup and view all the answers

Which of the following is NOT a characteristic of silicate ceramics?

They have a relatively low density Signup and view all the answers

Which of the following is NOT a primary polymorphic crystalline form of silica?

Silica glass Signup and view all the answers

Which of the following is NOT a network former in silica glasses?

CaO Signup and view all the answers

Which of the following is true about the crystal structure of silicates?

It is characterized by the arrangement of SiO44- tetrahedra Signup and view all the answers

Which of the following is true about fused silica?

It is also known as vitreous silica Signup and view all the answers

Silicate Ceramics and Crystal Structures

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Questions and Answers

Which of the following is the basic unit of silicates?

Which of the following is NOT a primary polymorphic crystalline form of silica?

Which of the following is true about silica glasses?

What is the chemical formula for silica?

What type of bonds are present in silica ceramics?

Which of the following is NOT a characteristic of silicate ceramics?

Which of the following is NOT a primary polymorphic crystalline form of silica?

Which of the following is NOT a network former in silica glasses?

Which of the following is true about the crystal structure of silicates?

Which of the following is true about fused silica?

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