Explain the reason for these:(a) Sky looks blue in colour. (b) Delta

1.	Explain the reason for these:(a) Sky looks blue in colour. (b) Delta is formed at the meeting place of river and sea water. (c) Blood coagulate on treatment of alum.
Answer» (a) Sky looks blue in colour because colloidal particles suspended in environment scatter the light and blue light is scattered maximum. (b) The charged colloidal particles of river water neutralized by ions present in sea water so coagulation take place. (c) The charged colloidal particles present in blood are neutralized by ions of alum.

Explain the reason for these:(a) Sky looks blue in colour. (b) Delta is formed at the meeting place of river and sea water. (c) Blood coagulate on treatment of alum.

Answer»

(a) Sky looks blue in colour because colloidal particles suspended in environment scatter the light and blue light is scattered maximum.

(b) The charged colloidal particles of river water neutralized by ions present in sea water so coagulation take place.