1) state the consequence of having 4/5 oxygen and 1/5 nitrogen in the air. 2) state the important uses of water in the daily life and for industrial purposes. 3) what is conservation of water. state and explain the methods used for conserving water. 4) what is potable water. state how water is made potable.
Answers
1) Normally we have Oxygen
amounting to 1/5th of air and Nitrogen to 4/5th. The Oxygen is used for
respiration by people, plants, animals, and all organisms. The Nitrogen is
fixed by bacteria to produce ammonia. During the lightning too ammonia is
produced. That is used in producing Amino acids and Nucleotides. They are the
nutrition for the plants.
If now Oxygen amounts to 4/5 of air and Nitrogen only to 1/5, then
people will be healthier as more Oxygen is available. Asthmatic people will
heal faster. But the nutrition for the plants may be reduced. Perhaps the
life of plants may be affected to some extent. For some thousands of
years people will do better.
2) water is used for washing clothes, houses, materials etc, for brushing,
bathing that is for cleaning in general.
Water is used for cooking food, quenching thirst, cooling air or
houses. Water keeps us alive. Water is used for industrial purposes to produce
many chemical compounds. Water is used to produce electricity and nuclear
energy. Water is used to prepare various chemical solutions, and paints. Water
is used for sports also.
3) Conservation of water means to collect water that is available in our region
from the ground, rivers, canals, lakes or through rain directly. There are many
methods like making ponds, rain water harvesting etc. Growing plants and
trees also helps conserve water. Constructing underground water tanks is also a
method.
4) Potable water means water that is fit for drinking purposes. It is clean and
germ free. Water is made potable by filtering using various filtering methods.
Reverse osmosis methods are effective and commercially used these days. We can
also boil water and collect the condensed water which is potable.