This set of Materials Science Multiple Choice Questions & Answers (MCQs) focuses on “Carbon”.
1. Carbon is a ceramic.
Explanation: The above statement is false. Carbon is not a ceramic material. An allotropic form of carbon called diamond can be considered as a ceramic.
2. What kind of bonds are present in diamond?
a) Covalent bond only
b) Ionic bond only
c) Mix of covalent and ionic bond
d) Metallic bonds
Explanation: Diamonds have only carbon-carbon bonds which are covalent in nature.
3. Which of the following materials can be used as a substitute ceramic?
Explanation: Diamond has properties resembling that of ceramics and hence can be used as a substitute ceramic. All the other options are metals and hence they can never be used as a ceramic.
4. What is a difference between carbon and ceramic?
a) Both are hard
b) Both are non metallic
c) Both have covalent bonds
d) Both have very high thermal conductivity
Explanation: Diamond has a very high thermal conductivity and doesn’t melt even at high temperature whereas ceramics do not have a high thermal conductivity.
5. Which of the following processes I not needed for making a synthetic diamond?
a) Application of high temperature
b) Application of high pressure
c) Chemical vapor deposition
Explanation: To make a synthetic diamonds, application of high temperature and pressure is used. Chemical vapor deposition can also be used to make synthetic diamonds.
6. Which of the following can be used for lubrication?
Explanation: Graphite due to its weak Vander Waals bonding between layers can be used as a lubricating agent.
7. Graphite is a good conductor of electricity.
Explanation: The above statement is true. Graphite is indeed a good conductor of electricity and it is chemically stable at even high temperatures.
8. The chemical composition of Buckminster Fullerene?
Explanation: The chemical composition of Buckminster Fullerene is C60. It is an allotropic form of carbon also called as Bucky-ball.
Sanfoundry Global Education & Learning Series – Materials Science.
To practice all areas of Materials Science, here is complete set of 1000+ Multiple Choice Questions and Answers.