question_answer 57)

    Which of the following process is responsible for the formation of delta at a place where rivers meet the sea? (a) Emulsification             (b) Colloid formation (c) Coagulation                  (d) Peptisation

Answer:

                    (c) River water is a colloidal solution of clay and sea. Water contains various electrolytes. When river water comes in contact with sea water, then the electrolytes present in sea water coagulate the suspended colloidal particles which ultimately settle down at the point of contact.