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प्रश्न
Complete the following chart by writing appropriate words in the boxes marked (a) to (e).
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उत्तर
- Solid
- Gaseous
- Well
- Lake
- Ice
APPEARS IN
संबंधित प्रश्न
Give balanced chemical equation for the reaction of water with Carbon dioxide.
Name the gas produced when fossil fuel is burnt.
Two gases found dissolved in natural water are
Explain how the peculiar variation of density of water with temperature can protect marine-life.
Answer the following question:
What is the chemical composition of water ? Give its molecular formula.
State whether the given statement are true or false. If true, write the reason.
Ganga−Brahmaputra plain of India is an overpopulated region.
Explain why:
Air dissolved in water contains a higher proportion of oxygen.
Explain why:
Water is an excellent liquid to use in cooling systems.
Select the correct answer of the following statement:
A decahydrate crystal.
Give a balanced equation for the following conversion:
Calcium sulphate in permanent hard water to calcium carbonate using sodium carbonate.
Give a balanced equation for the following conversion:
Potassium oxide to a strong alkali.
Define ‘eutrophication’.
State any two sources of water pollution.
Differentiate between the following:
Natural water and treated water
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 |
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 |
From where do the following usually get water? In which form is water present in them?
Aquifer
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)?
Wells are fed by ______.
