Water

Q.

Write a note on water conservation.

Q. The ancient water harvesting method used in Rajasthan is

1. Surangams
2. Kattas
3. Kulhs
4. Nadis

Q.

Write About The Whole Summary About The Prose Water The Elixir Of Life

Q.

Question 27
In a village in Karnataka, people started cultivating crops all around a lake which was always filled with water. They added fertilisers to their field in order to enhance the yield. Soon they discovered that the waterbody was completely covered with green floating plants and fishes started dying in large numbers.
Analyze the situation and give reasons for excessive growth of plants and death of fish in the lake.

Q.

What are the sources of water?

Q. The pH value for pure water ($H_{2}O$) is 7.0. What do you understand by this?

1. Pure water is Acidic
2. Pure water is Basic
3. Pure water is neither Acidic nor Basic but Neutral
4. Pure water is turns red litmus paper to blue

Q.

What should be the pH of pure water?

1. 1

2. 7

3. 14

4. 0

Q. The pH of water can be tested by using __.

1. reagents
2. detergents
3. indicators
4. inhibitors

Q.

Question 34
Is water conservation necessary? Give reasons.

Q.

Question 27
In a village in Karnataka, people started cultivating crops all around a lake which was always filled with water. They added fertilisers to their field in order to enhance the yield. Soon they discovered that the waterbody was completely covered with green floating plants and fishes started dying in large numbers.
Analyze the situation and give reasons for excessive growth of plants and death of fish in the lake.

Q.

The pH range most favourable for life of fresh water plants and animals is:

1. 2.0 - 3.5

2. 9.0 - 10.5

3. 3.5 - 5.0

4. 6.5 - 7.5

Q.

What pH is pure water?

Q. State true or false:
Water cycle can be pictorially represented as following:

1. True
2. False

Q. Which among the following is not an example of water harvesting techniques.

1. Khadins
2. Tanks
3. Sigri
4. Nadis

Q.

What is conservation of water? How can we conserve water?

Q. What is the percentage of earth surface which is covered by water?

1. $80$%
2. $97$%
3. $70$%
4. $65$%

Q. Question 4 (b)
How can you as an individual contribute or make a difference to the management of
(b) water resources?

Q.

Question 34
Is water conservation necessary? Give reasons.

Q.

State some of the ways in which you as an individual can conserve water.

Q.

How many major rivers in India have an action plan for conservation and sustenance?

__

Q. How does anomalous expansion of water help aquatic life?

1. Water below $4^{\circ }C$ comes up to the surface because of lower density
2. Water below $0^{\circ }C$ comes up to the surface because of lower density
3. Water above $4^{\circ }C$ comes up to the surface because of lower density
4. None of the above

Q. Khadins, Bundhis, Ahars and Kattas are the ancient structures that are the examples for ___.

1. water pollution
2. water harvesting
3. soil conservation
4. forest conservation practices

Q. When plants get submerged in water and decay, large amount of is produced.

1. chlorine
2. methane
3. fluorine

Q. Which of the following is a source of fresh water?

1. Rain water
2. Ground water
3. All of the above
4. Surface run-off

Q. Regions of water scarcity are closely correlated to the regions of acute poverty.

1. True
2. False

Q. Khadins, Ahars and Kattas are ancient structures that are examples of water harvesting.

1. True
2. Either
3. Nither
4. False

Q.

Which is the country having the largest number of hydroelectric dams?

1. India

2. China

3. USA

4. Netherlands

Q. The pH value for pure water ($H_{2}O$) is 7.0. What do you understand by this?

1. Pure water is Acidic
2. Pure water is turns red litmus paper to blue
3. Pure water is Basic
4. Pure water is neither Acidic nor Basic but Neutral

Q.

Which is the common name for the top layer of the zone of saturation?

1. Cost of Water

2. Water Top

3. The Water Table

4. High End

Q. Small scale initiatives like building can be adopted for rainwater harvesting.

1. dams
2. handpumps
3. kulhs