Advertisements
Advertisements
Question
Fill in the blanks in the following statements using words given in the box.
| air, handpumps, cholera, water, large, ground |
A very ______ number of our people defecate in the open. It may cause ______ pollution and soil pollution. Both the surface water and ______ water get polluted. ______ water is the source for wells, tubewells and ______. Thus it becomes the most common route for ______ borne diseases like ______, dysentery, etc.
Advertisements
Solution
A very large number of our people defecate in the open. It may cause water pollution and soil pollution. Both the surface water and ground water get polluted. Ground is the source for wells, tube-wells and hand pumps. Thus it becomes the most common route for water borne diseases like cholera, dysentery, etc.
APPEARS IN
RELATED QUESTIONS
Why is water essential for life?
Give reason On opening a bottle of a cold drink, a fizz sound is heard.
Give one word for the following statement:
The gaseous form of water found in air .
Answer the following question:
Why is acid added to water before electrolysis ?
What are its causes and how can water pollution be controlled ?
State whether the given statement are true or false. If true, write the reason.
Water availability per person in India is declining.
Why is water considered a compound?
What is the effect of impurities present in the water on the melting point and boiling point of water?
State the importance of the solubility of CO2 and O2 in water.
Explain why:
Air dissolved in water contains a higher proportion of oxygen.
Name the solute, solvent & solution in the statement – ‘sodium chloride dissolves in water to give sodium chloride solution’. Define each of the terms in italics.
Select the correct answer of the following statement:
A decahydrate crystal.
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 |
______ plays a vital role in the evolution and survival of life.
State whether the following statement is True or False. If false, write the correct statement.
Rapid growth of industries is one of the causes for water shortage
State whether the following statement is True or False. If false, give the correct statement.
Snow and ice both are solid forms of water
From where do the following usually get water? In which form is water present in them?
Plants
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)?
Write any two activities which require more than a bucket of water.
