Advertisements
Advertisements
प्रश्न
Animal waste, oil and urea are some of the organic impurities present in sewage. Name two more organic impurities present in sewage.
Advertisements
उत्तर
Pesticides and fruits and vegetable wastes are organic impurities present in sewage.
APPEARS IN
संबंधित प्रश्न
State the importance of water cycle in nature.
Give balanced chemical equation for the reaction of water with Sodium .
Name the gas produced when steam is passed over hot coke.
The ultimate source of all water on the earth is
Answer the following question:
Why is acid added to water before electrolysis ?
Answer the following question:
What is the chemical composition of water ? Give its molecular formula.
What do you understand by Temporary hardness?
Compare the effect of soaps and detergents on hard water.
Give the influence of pressure.
Match the terms in List I with the correct answers in List II.
| List I | List II |
| 1. Solubility in a given solvent decreases with an increase in temperature. | A: Na2SO4.10H2O |
| 2. A white efflorescent crystal | B: NaOH |
| 3. A hygroscopic dehydrating agent | C: Ca(HCO3)2 |
| 4. A deliquescent alkali | D: conc. H2SO4 |
| 5. A substance present in temporary hard water | E: CaSO4 |
_____ is a type of rainwater harvesting.
Water levels in rivers increase greatly during ______.
Sea water can be used for irrigation as such.
Nitrogen is used for the treatment of drinking water.
Which of the following does not show water shortage?
From where do the following usually get water? In which form is water present in them?
Clouds
From where do the following usually get water? In which form is water present in them?
Plants
What is water?
In which one of the following state's water is present on Earth?
Write any two activities which require more than a bucket of water.
