Advertisements
Advertisements
प्रश्न
Why is water very precious for all living being ?
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 balanced chemical equation for the reaction of water with Sodium oxide.
Answer the following question:
What is the chemical composition of water ? Give its molecular formula.
State whether the given statement are true or false. If true, write the reason.
Ganga−Brahmaputra plain of India is an overpopulated region.
Explain why:
Water is an excellent liquid to use in cooling systems.
What do you understand by Temporary hardness?
Give a balanced equation for the following conversion:
Potassium oxide to a strong alkali.
What is meant by the term ‘offshore drilling’. State the main environmental effects of offshore drilling.
Among the given options, which one is not correct for the use of large amounts of fertilisers and pesticides?
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.
Fill in the blanks in the following statements using words given in the box.
air, handpumps, cholera, water, large, ground
A very _________ number of our people defecate in the open. It may cause _________ pollution and soil pollution. Both the surface water and _________ water get polluted. _________ water is the source for wells, tubewells and _________. Thus it becomes the most common route for _________ borne diseases like _________, dysentery, etc.
