Write two application of colloid in the purification of drinking water and in photographic plates & film.

Write any two application of centrifugation?

Write two important application of fractional distillation.

Mention two industrial applications of colloids.

Write two properties of water which are due to hydrogen bonding.

Science, like any knowledge, can put to good or bad use, depending on the user. Given below are some of the applications of science. Formulate your views on whether the particular applicatioa is good, bad -orsomething that cannot be so clearly, categorized : (a) Mass vaccination against small pox to curb and finally eradicate this disease from the population. (This has already been successfully done in India). Television for eradiction of illeteracy and for mass communication of news and ideas. Prenatal sex determination Computers for increase in work efficiency.. . Puttiing artificial satellites into orbits around the Earth. Development of nuclear weapons. Development of new and powerful technique of chemical and biologicaal warfaree. Purificaitoin of water for drinking. plastiic Surgery and cloning.

Write two factors affecting viscosity. Which one is more viscous : pure water or saline water?