Potable Water

Q.

In the traditional way of filtration we use 3 pots with charcoal at the top most pot, gravel at the second pot and sand at the third pot. but in place of charcoal and gravel if we use sand will iit be a better idea?why?

Q.

The water fit for human consumption and for drinking purposes is called potable water.

1. True

2. False

Q.

Explain why, even clear, transparent and odourless water may not always be safe for drinking.

Q.

Many salts absorb water from the atmosphere. This property is called:

1. Hydration

2. Dehydration

3. Efflorescence

4. Deliquescence.

Q.

Why should sewage be treated before being discharged into a water body?

Q.

Name any two diseases caused by drinking polluted water containing sewage.

Q.

Explain the traditional way of purifying water to make it fit for drinking.

Q. What is fluorosis ? How does it affect people ? In which parts of our country it is mainly found?

Q.

Which of the following disease cannot be caused by drinking of river water contaminated with untreated sewage?

(a) cholera

(b) typhoid

(c) tuberculosis

(d) diarrhoea

Q.

(a) What is potable water ? Name any two methods to make water safe for drinking.

(b) State two ways in which you can conserve water at home by preventing its wastage.

Q.

How are living organisms dependent on the soil ? Are organisms that live in water totally independent of soil as a resource ?

Q.

Explain the term mineral water

Q.

Identify the popular water purification technique that is used for purification of drinking water in cities.

1. Reverse Osmosis

2. Chlorination

3. Melting

4. Boiling

Q. What are the properties of potable water?

1. Free from harmful contaminants
2. Replenished with natural minerals
3. Alkaline pH balanced
4. All of the above

Q. type filter is a popular household filter.

1. Waterfall
2. Spiral
3. Candle type
4. Metal

Q. What is potable water?

1. Drinking water
2. Contaminated water
3. Water with low mineral content
4. Water with high mineral content

Q. Potable water is the water that is​

1. obtained from a river​
2. obtained from a lake​
3. pure and fit for drinking​
4. used only for washing clothes​

Q.

How can water be made safe for drinking purpose

Q. 3R refers to:

1. Realise, Reuse, Recycle
2. Reduce, Reuse, Recycle
3. Release, Reduce, Reuse
4. Rest, Realise, Race

Q. Water which is fit or safe for drinking is known as water.

1. sea
2. potable
3. sewage

Q.

Which of the following measures will help to ensure the supply of clean water to the society?

1. Growing fish near muncipality water pumps

2. Adding excess bleaching powder to water

3. Organize awareness programmes and proper maintenance of pipes.

4. Domestic wastes should be dumped to the local water supply.

Q.

Water completely free from all solid and dissolved impurities is not necessarily potable as well.

1. True

2. False

Q. Oxides of which of the following are responsible for the acid rain?

1. Sulphur
2. Copper
3. Nitrogen
4. Zinc

Q. You are a member of the municipal body of your town.
Make a list of 5 measures that would help your town to ensure the supply of clean water to all its residents. [5 MARKS]​

Q.

Which of the following activity is responsible for blocking drains from spreading vector-borne diseases such as malaria and dengue?

1. Domestic waste and plastic

2. Industrial waste

3. Agricultural waste

4. Oil spill

Q.

Identify the popular water purification technique that is used in domestic cities.

1. Reverse Osmosis

2. Boiling

3. Chlorination

4. Melting

Q. ____ is the byproduct obtained from a wastewater plant.

1. Oxygen
2. Biogas
3. Grit
4. Plastic

Q.

Why is mineral water better than distilled water for drinking?

1. Mineral water is easily available.
   

2. Mineral water contains dissolved salts.
   

3. Mineral water is colourful.

4. Mineral water is cheap.
   

Q.

Which of the following water is not fit for drinking?

1. Saline Water

2. Potable Water

3. Distilled water

4. Ground water

Q. Water that is purified and fit for drinking is known as:

1. Saline water
2. aerated water
3. potable water
4. mineral water