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प्रश्न
In a filtration, plant water is filtered using layers of
पर्याय
sand and clay
clay and fine gravel
sand and fine gravel
sand, fine gravel and medium gravel
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उत्तर
sand, fine gravel and medium gravel
Explanation:
In wastewater treatment, wastewater is allowed to enter a grit and sand removal tank. Here, the speed of wastewater is reduced in order to allow sand, grit and pebbles to settle down.
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संबंधित प्रश्न
Give balanced chemical equation for the reaction of water with Sodium .
Give the molecular formula of water ?
Why is water considered a compound?
What causes the violence associated with torrential rain?
Why is it said that water is life?
The water in a lake is called ground water.
Complete the statement by filling the blank with the correct word from the option.
Solubility of most solids ___ with rise in temperature.
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 ____.
State any two sources of water pollution.
Write a few slogans of your own on the topic “Save Water”
Water is colourless, odourless and _______.
Match Column I with Column II
| Column I | Column II | ||
| (a) | Ground water | (i) | Solid form of water |
| (b) | Bawri | (ii) | Wastage of water |
| (c) | Snow | (iii) | Water management |
| (d) | Drip irrigation | (iv) | Small water |
| (e) | Leaking taps | (v) | Water table |
Water polluted by various human activities causes a number of water borne diseases. Which of the following is not a water borne disease?
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 |
Think and suggest some ways to minimise waste and pollutants at their source, taking your home as an example.
Fill in the blanks selecting words from the following list
snow, rain, clouds, vapour, evaporation, transpiration.
Water, as ______ goes into atmosphere by the processes of ______ and ______ and forms ______, which on condensation fall in the form of ______ and ______.
Dissolve two spoons of common salt in half a cup of water. Now if you want to get the salt back, what will you do?
