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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
Name the four main sources of water.
Name the gas produced when chlorine is dissolved in water and exposed to sunlight.
Use of excessive .................... by farmers causes water pollution.
Two gases found dissolved in natural water are
Answer the following question:
Name two gases dissolved in natural water.
Give balanced chemical equations to show the reaction between Coke and steam.
Explain why:
Rain water does not leave behind concentric rings when boiled.
Give the importance of dissolved minerals & salts.
Give the importance of dissolved air – in water.
Give a balanced equation for the following conversion:
Calcium sulphate in permanent hard water to calcium carbonate using sodium carbonate.
Household detergents contain mainly ______ and pollute water bodies.
Name a deliquescent substance’.
State any two sources of water pollution.
State the importance of water for all general uses.
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 |
Suggest some ideas to save rainwater in your school.
Around 97% of water available on earth is ______ water.
Rivers from land, add minerals to seawater. Discuss how?
In the coastal areas, wind current moves from the sea towards the land during the day; but during the night it moves from land to the sea. Discuss the reason.
Which of the following is waste water?
