Question

Delta formation at the mouth of river takes place by:

• A. coagulation of negative salt ions and positive river particles
• B. coagulation of positive salt ions and negative river particles
• C. coagulation of positive salt ions and positive river particles
• D. coagulation of negative salt ions and negative river particles

Answer 1

The correct option is B coagulation of positive salt ions and negative river particles

River water contains charged colloidal particles of clay, sand and many other materials. Sea water is very big store house of a variety of electrolytes dissolved in it. As soon as river water comes in contact with sea water coagulate the suspended colloidal particles which ultimately settle down at the point of contact. Thus the level of the river bed rises. As a result, water adopts a different course and delta is formed in due course of time.