What is the correct sequence of the following salts in ascending order according to their presence in the sea water ? 1. Calcium Carbonate 2. Calcium Sulphate 3. Magnesium Chloride Select the answer using the code given below :

The salinity of seawater is dominated by specific dissolved salts in a consistent relative order. According to oceanographic data, Sodium Chloride is the most abundant (77.7%), followed by Magnesium Chloride (10.9%) [1]. Among the salts listed in the question, Magnesium Chloride has the highest concentration at approximately 10.9% [1]. Calcium Sulphate follows with a concentration of approximately 3.6% [1]. Calcium Carbonate is present in much smaller quantities, as the total dissolved inorganic carbon (including bicarbonate and carbonate ions) is relatively low, with carbonate ions being a minor fraction of that total. Therefore, the ascending order (from least to most abundant) is Calcium Carbonate (1), followed by Calcium Sulphate (2), and finally Magnesium Chloride (3). This sequence corresponds to the order 1, 2, 3.

Sources

1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 33: Ocean temperature and salinity > 33.2. Ocean Salinity > p. 518