Substances that have giant covalent structures may be used as lubricants and also as cutting tools for hard materials. The diagram illustrates the arrangement of atoms in two giant covalent substances, X and Y. Which statement is correct?
- AOnly X is used as a cutting tool and only Y is used as a lubricant.
- BOnly X is used as a lubricant and only Y is used as a cutting tool.
- CX and Y are both used as cutting tools.
- DX and Y are both used as lubricants.