Advertisements
Advertisements
प्रश्न
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 |
Advertisements
उत्तर
| Column I | Column II | ||
| (a) | Inorganic impurities | (ii) | nitrates and phosphates |
| (b) | Organic impurities | (iv) | pesticides and herbicides |
| (c) | Nutrients | (i) | phosphorus and nitrogen |
| (d) | Bacteria | (iii) | cholera and typhoid |
APPEARS IN
संबंधित प्रश्न
Use of excessive .................... by farmers causes water pollution.
Describe the water-cycle in nature.
How are natural springs of water formed ?
Answer the following question.
Suggest three ways to conserve water.
Explain why:
Air dissolved in water contains a higher proportion of oxygen.
Explain why:
Fused CaCl2 or conc. H2SO4 is used in a desiccator.
Explain why:
Table salts become sticky on exposure to humid air during the rainy season.
Give the importance of dissolved minerals & salts.
Give a balanced equation for the following conversion:
Calcium sulphate in permanent hard water to calcium carbonate using sodium carbonate.
Complete the statement by filling the blank with the correct word from the option.
Kerosene & water form a _______ mixture.
Complete the statement by filling the blank with the correct word from the option.
The ratio of hydrogen & oxygen in water is ____.
Fill in the blank:
The type of water softened by addition of washing soda is ______.
Fill in the blank:
Unpolluted water has _____ amount of dissolved oxygen.
Name one substance which is ‘deliquescent’.
Define ‘eutrophication’.
Explain why oil spills have an adverse effect on marine life.
Water levels in rivers increase greatly during ______.
What is the source of water in the following?
Wells
A jumbled word is given here. Write the correct form of the word.
WOSN
Water in our tap comes from a ______.
