Answer: Sodium chloride is the most most abundant dissolved salt in ocean water.
Explanation:
Oceans are made of sea water and sodium chloride is the most abundant dissolved salt in ocean water.
Sea water upon evaporation leaves a salt. This salt is then collected and purified for human use. As sea water gets contaminated due to the dirty water coming from various sources.
Therefore, the sodium chloride in sea water also gets contaminated. Hence, purification of this salt is required.
