Advertisements
Advertisements
प्रश्न
State the importance of water for all general uses.
उत्तर
Importance of water: Water is vital for the growth of plants and animal life. Water is also essential for industrial processes, agricultural processes transportation, and power generation, and cleanliness.
APPEARS IN
संबंधित प्रश्न
Name the gas produced when chlorine is dissolved in water and exposed to sunlight.
Explain how the peculiar variation of density of water with temperature can protect marine-life.
State whether the given statement are true or false. If true, write the reason.
Water availability per person in India is declining.
Why is it said that seawater is useful even though it is not potable?
Name the solute, solvent & solution in the statement – ‘sodium chloride dissolves in water to give sodium chloride solution’. Define each of the terms in italics.
Select the correct answer of the following statement:
A drying agent placed in desiccator.
Name one substance which is ‘deliquescent’.
What is meant by the term ‘offshore drilling’. State the main environmental effects of offshore drilling.
Look at the map of Tamilnadu showing annual rainfall and answer the questions given below
- Identify the districts that get only low annual rainfall in Tamilnadu.
- Identify the districts that get a medium annual rainfall in Tamilnadu.
- State the districts that enjoy high annual rainfall in Tamilnadu.
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 |
