This substance must be Non-polar, as it dissolved in a non-polar solvent. It conducts as a solid, meaning it must be either a metal, or graphite, a Covalent network. Based on the fact that it dissolved in a non polar solution, it must be Graphite, a covalent network, with a continuous lattice

This substance did not dissolve in either water or cyclohexane, meaning it must be a metal. As it also conducted in the solid state, and was malleable, it must have metallic bonds

This substance is a liquid at room temperature, ruling out metallic, ionic bonds or a covalent network. it also does not conduct either on its own or as a solution in cyclohexane, and did not dissolve in water, meaning it is non polar. Due to this, this substance must have covalent molecular bonds

Based on the fact that this solution did not conduct as a solid, but did conduct as a solution in water, it must be Ionic. In addition, it also did not dissolve in cyclohexane, and was crystalline in appearance. This solution is an ionic lattice

This substance was a liquid at room temperature. it dissolved in a non polar solvent, but did not conduct in solution or on its own. it has an equal density to water. Taking this into consideration, this substance must be a non polar covalent molecule