The Second most prevalent salt in sea water is:

Question

Accepted Answer

The second most prevalent salt in seawater is indeed Magnesium Chloride (Option 2). Here's why:

*   **Magnesium Chloride's Abundance:** After Sodium Chloride (table salt), Magnesium Chloride is the next most abundant salt found in seawater. Its concentration is significantly higher than Calcium Sulphate or Potassium Sulphate.

Now, let's look at why the other options are incorrect:

*   **Option 1: Calcium Sulphate:** While Calcium Sulphate is present in seawater, its concentration is much lower than both Sodium Chloride and Magnesium Chloride. It's a less significant component of the overall salt composition.

*   **Option 3: Sodium Chloride:** Sodium Chloride is the *most* abundant salt in seawater, not the second most. It makes up the vast majority of the dissolved salts.

*   **Option 4: Potassium Sulphate:** Potassium Sulphate is present in seawater, but its concentration is considerably lower than Magnesium Chloride. It's a minor component compared to the two most prevalent salts.

Therefore, based on the relative abundance of salts in seawater, Magnesium Chloride (Option 2) is the correct answer as the second most prevalent salt.