Advertisements
Advertisements
प्रश्न
State whether the given statement are true or false. If true, write the reason.
Water availability per person in India is declining.
विकल्प
True
False
Advertisements
उत्तर
Water availability per person in India is declining.
This statement is true. Though water is present in abundance, fresh water is a scarce resource. Water availability is a serious problem in many regions of the world. Due to the wastage of water, deforestation, and the pollution and depletion of fresh water reserves (such as rivers and ground water), the availability of water is fast declining.
APPEARS IN
संबंधित प्रश्न
Why is water essential for life?
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 |
What causes the violence associated with torrential rain?
Define
Henry's law
Explain why:
Fused CaCl2 or conc. H2SO4 is used in a desiccator.
Give the importance of dissolved minerals & salts.
“Every Drop Counts” is a slogan related to
Match the items of Column I with the items of Column II with reference to sewage.
| Column I | Column II | ||
| (a) | Inorganic impurities | (i) | phosphorus and nitrogen |
| (b) | Organic impurities | (ii) | nitrates and phosphates |
| (c) | Nutrients | (iii) | cholera and typhoid |
| (d) | Bacteria | (iv) | pesticides and herbicides |
A mixture (x) in water contains suspended solids, organic impurities, inorganic impurities (a), nutrients (b), disease-causing bacteria and other microbes. Give names for (x), (a) and (b)?
What is saltwater?
