Respuesta :
The correct answer is option 4, that is, an ionic compound.
The mentioned features belong to an ionic compound. The ionic compounds exhibit strong bonds in between their atoms, that is, an ionic bond is the strongest molecular bond, this confirms that ionic compounds exhibit a high melting point.
The ionic compounds do not transmit current, as they do not possess free electrons, like metals, thus, they are poor conductors as solid. The ionic compounds get dissolve in water and form ions that are the charges, which can move, making them good conductors as a liquid. The composition of the ionic compound is a set of crystals that makes them brittle and hard.
The compound with a high melting point, hard, brittle, solid at room temperature, and conducts electricity in an aqueous solution is option 4, an ionic compound.
The ionic compounds are the strong intermolecular bond formed compound that has high energy.
Due to the high energy, they find it hard to break the intermolecular forces and thus have a high melting point. The ionic bonds, act as the solid metallic bond. They thus find it hard to conduct electricity.
Although, the formation of the aqueous solution will dissociate the ionic compound and the free ion helps in the conduction of electricity.
Thus, the compounds with a high melting point, hard, brittle, solid at room temperature, and conduct electricity in an aqueous solution is ionic compound. Thus option 4 is correct.
For more information about the elements, refer to the link:
https://brainly.com/question/19545393
