Question 1:
Fill in the blanks:
(a) Ceramic is a non ________ solid element and non ________ compound.
(b) Give three examples of substances that make up ceramics.
Answer:
(a) metal; organic
(b) Carbon, titanium carbide, silicon carbide
Fill in the blanks:
(a) Ceramic is a non ________ solid element and non ________ compound.
(b) Give three examples of substances that make up ceramics.
Answer:
(a) metal; organic
(b) Carbon, titanium carbide, silicon carbide
Question 2:
Silicon carbide is an example of advanced ceramic that has a hard structure and diamond-like properties. Can silicon carbide be used to make drinking glass?
Explain.
Answer:
Can
• Hard and strong, that is, not easily broken
• Chemically inert, that is, safe to be used
• Has low expansion coefficient or resistant to heat, that is resistant to thermal shock
Cannot
• Expensive to produce
• Not transparent
Silicon carbide is an example of advanced ceramic that has a hard structure and diamond-like properties. Can silicon carbide be used to make drinking glass?
Explain.
Answer:
Can
• Hard and strong, that is, not easily broken
• Chemically inert, that is, safe to be used
• Has low expansion coefficient or resistant to heat, that is resistant to thermal shock
Cannot
• Expensive to produce
• Not transparent
Question 3:
Kaolin is a white clay used to make white pottery. What substance must be added to produce green coloured pottery? Explain.
Answer:
Iron(II) oxide. Iron(II) compound contains Fe2+ ions that give it a green colour.
Kaolin is a white clay used to make white pottery. What substance must be added to produce green coloured pottery? Explain.
Answer:
Iron(II) oxide. Iron(II) compound contains Fe2+ ions that give it a green colour.