(i) In drinking water, the proportion of salts is quite low. Water from oceans and seas has a greater amount of salt. Hence it tastes salty.
(ii) Volcanic eruptions leads to increase in the level of salts and minerals in ocean water.
(iii) Volcanic eruptions takes place in the oceans. During volcanic eruptions different minerals, ashes, salts and gases are added to the water. This increases the level of salts and minerals in ocean water.
(iv) Due to continuous evaporation of oceanic water, the proportion of salt increase.
