Graphite
Glass
Brass
Steel
Answer is Right!
Answer is Wrong!
The correct answer is: A. Graphite
Graphite is a pure element, while the other options are all mixtures.
- Graphite is a crystalline form of carbon that is naturally occurring. It is a soft, black, and slippery substance that is used in a variety of applications, including pencils, lubricants, and batteries.
- Glass is an amorphous solid, meaning that it does not have a regular crystal structure. It is made by melting silica sand and other materials, and then cooling it rapidly. Glass is transparent, hard, and brittle.
- Brass is an alloy of copper and zinc. It is a strong, durable metal that is used in a variety of applications, including plumbing fixtures, musical instruments, and jewelry.
- Steel is an alloy of iron and carbon. It is a strong, versatile metal that is used in a variety of applications, including construction, machinery, and automobiles.