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
Name the gas produced when fossil fuel is burnt.
Give reason of Alcohol is mixed with water and is used in car radiator.
.................... is the purest form of natural water.
Match the statements in column A with that in column B.
| Column A | Column B |
| (a) deliquescent substance | (1) sodium bicarbonate |
| (b) hygroscopic substance | (2) magnesium chloride |
| (c) efflorestance substance | (3) conc. sulphuric acid |
| (d) substance causing temporary hardness | (4) washing soda |
Two gases found dissolved in natural water are
What do you understand by Temporary hardness?
Explain the following observation:
Washing-soda become coated with a white powder when left exposed to the atmosphere.
37% of our brain‛s mass consists of water.
Write a few slogans of your own on the topic “Save Water”
A jumbled word is given here. Write the correct form of the word.
WOSN
