Answer the following questions:
Arav records the following observations during different reactions:
| Property | X | Y | Z |
| Melting point | Low | High | High |
| Solubility in water | Insoluble | Soluble | Insoluble |
| Conductivity | No | Yes | No |
1. Arav asked why do many covalent compounds dissolve in organic solvents like benzene or petrol?
2. Arav claims that graphite can conduct electricity although it is made only of carbon atoms. Why?
3. Arav says, "All covalent compounds have low melting points." Is the statement correct? Justify your answer. Justify your answer.