Which solid conducts electricity most efficiently? (reasoning )
a. sodium chloride
b. sugar
c. graphite
d. gold

Option (c) is the correct answer.

Explanation:

Graphite is an allotrope of carbon and it is a solid which represents properties of both metals and non-metals.

It is known that in order to conduct electricity it is necessary for an atom or solution to have free or mobile electrons.

Graphite is a good conductor of electricity because of the presence of delocalised free electrons.

Thus, we can conclude that graphite is a solid which conducts electricity most efficiently.

coral.

explanation:

coral. many marine organisms that produce calcium carbonate shells or skeletons are negatively impacted by increasing co2 levels and decreasing ph in seawater.