Tag: water in our life

Questions Related to water in our life

Out of the total at any time, water present in the atmosphere is

evs water in our life where do we get water from? why conserve water uses of water

  1. 0.01%

  2. 0.02%

  3. 0.001%

  4. 0.005%

Show answer
Correct Option: C
Explanation:
  • In the atmosphere, water exists as a gas (water vapor from evaporation), as a liquid (droplets of rain and liquid water that coats solid particles), and as a solid (snow and ice).
  • The water in the atmosphere makes up only a very small percentage of the total water on Earth i.e 0.001%.
  • Hence Out of the total at any time, water present in the atmosphere is 0.001%.
  • So, the correct answer is '0.001%'.

Percentage of fresh water in the hydrosphere is

evs water in our life where do we get water from? why conserve water uses of water

  1. 2.5%

  2. 30%

  3. 13%

  4. 33%

Show answer
Correct Option: A
Explanation:

Percentage of fresh water in the hydrosphere is 2.5%. Out of this, about 68% of the fresh water is found in icecaps and glaciers and about 30% is found in ground water. About 98.5% of water in the hydrosphere is salt water.

Thus, the correct answer is '2.5%.'

Amount of fresh water present as polar and glacial ice is

evs water in our life where do we get water from? why conserve water uses of water

  1. 0.5%

  2. 1.97%

  3. 0.02%

  4. 0.01%

  5. 2.5%

Show answer
Correct Option: B

What are the advantages of water stored in the ground than pond water?

evs water in our life where do we get water from? why conserve water uses of water

  1. It does not evaporate.

  2. It spreads out to recharge wells.

  3. Provides moisture for vegetation over a wide area.

  4. All of the above.

Show answer
Correct Option: D
Explanation:
The advantages of water stored in the ground than pond water:
(a) It does not evaporate
(b) It spreads out to recharge wells.
(c) Provides moisture for vegetation over a wide area.
(d) It is protected from contamination by animal and human wastes.
(e) It prevents breeding of insects.
Therefore, the correct answer is option D.

Study the given statements and select the correct answer.


(I) Lipids are macromolecules but obtained under-macromolecular fraction due to their insoluble nature in the aqueous medium of a cell.
(II) Water is the most abundant chemical in a living organism.
(III) The first respiratory substrate is lipid.
(IV) Dihydroxyacetone occurs in d and l form.

chemistry water in our life where do we get water from? why conserve water uses of water

  1. I, II and IV are correct

  2. I, II & III are correct

  3. I, II are correct

  4. III and IV are correct

Show answer
Correct Option: A
Explanation:
(I) Lipids are micromolecules as they are not polymers. These are monomers made up of three fatty acids attached to a glycerol. Because these are hydrophobic, they are obtained under the macromolecule fraction.
(II) Water is the most abundant chemical in the living organism.
(III) Glucose acts as the first respiratory substrate.
(IV) Dihydroxyacetone occurs in both the D and L form.
Hence, the correct answer is 'I, II and IV are correct'

Largest amount of fresh water is found in

evs water in our life where do we get water from? why conserve water uses of water

  1. Lakes and streams

  2. Underground

  3. Polar ice and glaciers

  4. Rivers

Show answer
Correct Option: C
Explanation:

Over 68 percent of freshwater is found in polar ice & glaciers, while 30 percent is found in ground water, 0.3 percent is found in surface water of lakes rivers & ponds

So, the correct answer is 'Polar ice and glaciers'

The salinity of sea water is

evs water in our life where do we get water from? why conserve water uses of water

  1. $2.5$%

  2. $3.5$%

  3. $4.5$%

  4. $5.5$%

Show answer
Correct Option: B
Explanation:

Sea water has a salinity of 3.5% i.e. the sea water contain about 35 grams of dissolved salt per kg of water ( about 1 litre of water ). This salinity is because of the rivers that carry chemical/salts dissolved out of rocks and soil. NaCl makes the most of this dissolved salt. 

So, the answer is option B

Of the total fresh water, ground water constitutes

evs water in our life where do we get water from? why conserve water uses of water

  1. 90%

  2. 10%

  3. 30%

  4. 44.2%

Show answer
Correct Option: C
Explanation:

Percentage of fresh water in the hydrosphere is 2.5%. Out of this, about 68% of the fresh water is found in icecaps and glaciers and about 30% is found in ground water. About 98.5% of water in the hydrosphere is salt water.

Thus, the correct answer is '30%.'

The formation of ________ is the most characteristic feature in upper course of a river

evs water in our life where do we get water from? why conserve water uses of water

  1. landslide

  2. canyons

  3. gorges

  4. waterfalls

Show answer
Correct Option: D

More than 70% of world's freshwater is contained in

evs water in our life where do we get water from? why conserve water uses of water

  1. Antarctica

  2. Glaciers and mountains

  3. Greenland

  4. Polar ice

Show answer
Correct Option: D
Explanation:

The oceans hold about 97% of water and the glaciers and polar ice caps hold another 2% of the total water on Earth. The polar ice caps contain 77% of the world's fresh water supply and another 22% is trapped in the ground, which leaves only 3% of the world’s fresh water supply in lakes and rivers.