Advertisements
Advertisements
प्रश्न
Why is water very precious for all living being ?
Advertisements
उत्तर
Water is one of the most precious substances for the existence of life. Since life on the earth began in the oceans, and since no living thing can survive without water, it is rightly called the source of life.
Water forms a large part of the body mass of all living organisms — 90% of human blood is water. Water has the ability to dissolve a number of substances. Therefore, it serve as the liquid medium in which all reactions within the living body take place.
Fruits and vegetables contain water in them. Even dry-looking substances like wood, peas, beans, grams, etc., contain some amount of water.
APPEARS IN
संबंधित प्रश्न
Give reason for Silica gel pouches are kept in unused water bottle.
Give balanced chemical equation for the reaction of water with Iron .
Name the gas produced when steam is passed over hot coke.
State whether the given statement are true or false. If true, write the reason.
Water availability per person in India is declining.
Fill in the blank:
Unpolluted water has _____ amount of dissolved oxygen.
Name one substance which is ‘deliquescent’.
Select the correct word from the words in option to complete the sentence:
If pressure on the surface of water increases its boiling point ____ and freezing point ____.
Select the correct word from the words in option to complete the sentence:
Dissolved air in water contains a ____ percentage of oxygen than ordinary air.
What is needed to construct a rain water harvesting pit?
In the coastal areas, wind current moves from the sea towards the land during the day; but during the night it moves from land to the sea. Discuss the reason.
