Which one of the following sequences correctly represents the percentage of salts found in seawater in decreasing order?

Correct option is A

The correct sequence of salts in seawater by their percentage in decreasing order is sodium chloride, followed by magnesium chloride, magnesium sulphate, and calcium sulphate. Sodium chloride, or common table salt, constitutes the largest proportion of dissolved salts in seawater. Magnesium compounds, including magnesium chloride and magnesium sulphate, come next in terms of abundance. Calcium sulphate is found in smaller amounts compared to the others.
Information Booster:
· Sodium chloride makes up about 77% of the total dissolved salts in seawater.
· Magnesium chloride constitutes around 10.9%, while magnesium sulphate makes up 4.7%.
· Calcium sulphate accounts for about 3.6% of the salts.
· Other minor components include potassium chloride and bicarbonates.
· The salinity of seawater averages about 35 parts per thousand (ppt).