• Water as nutrient - class-VIII
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Water as nutrient - class-VIII

Description: water as nutrient
Number of Questions: 16
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Tags: how much food, what type of food constitutes of diet sources of water biology a healthy diet evs food components and nutrition health and hygiene - food for living health and hygiene nutrition for a pollution free nation
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Water has 

biology food components and nutrition water as nutrient basics of water pollution sources of water

  1. High surface tension and low thermal conductivity.

  2. Low surface tension and low thermal conductivity.

  3. High surface tension and high thermal conductivity.

  4. Low surface tension and high thermal conductivity.

Show answer
Correct Option: C

Percentage of water in the body of a living being like human is 

biology food components and nutrition water as nutrient basics of water pollution sources of water

  1. 10-20 % 

  2. 50 % 

  3. 70 - 80% 

  4. 90-95 % 

Show answer
Correct Option: C

In contact with water, phospholipids forms

biology food components and nutrition water as nutrient basics of water pollution sources of water

  1. Rounded aggregates

  2. Monolayer

  3. Bilayer

  4. All of the above

Show answer
Correct Option: C

Hydrogen bonds amongst water molecules have bestowed the property of 

biology food components and nutrition water as nutrient basics of water pollution sources of water

  1. Liquid with ability to flow.

  2. High velocity, high specific heat and high heat of vaporisation.

  3. High boiling point and low freezing point.

  4. All of the above.

Show answer
Correct Option: D

In a living systems, water is involved as a chemical in

biology food components and nutrition water as nutrient basics of water pollution sources of water

  1. Photosynthesis and repiration

  2. Synthesis of polymers

  3. Hydrosis of biochemicals

  4. All of the above

Show answer
Correct Option: D

Water is an end product in which of the following process?

biology food components and nutrition water as nutrient basics of water pollution sources of water

  1. Glycogenolysis

  2. Hydrostatic skeleton

  3. Respiration

  4. Carbon assimilation

Show answer
Correct Option: C

Living cell contains $60 - 75$% water. Water present in human body is

biology food components and nutrition water as nutrient basics of water pollution sources of water

  1. $60 - 65$%

  2. $50 - 55$%

  3. $75 - 80$%

  4. $65 - 70$%

Show answer
Correct Option: D
Explanation:
Our cells are made of 60-75% water, hence most of the enzymes and protein molecules, our genetic material, all are water soluble and are evolved in a way to co-exist in water surrounding environment. Thus our proteins are folded in a way where the hydrophobic amino acid residues are folded inside the protein and hydrophilic residues face the hydrated outer environment. Similarly our DNA, RNA are all water soluble. Since the structural and functional unit of our body, consists of 60-75% of water hence, the entire human body is expected to have similar water content.
So, the correct answer is '65−70%'.

When a litre of water is introduced in human blood, 

biology food components and nutrition water as nutrient basics of water pollution sources of water

  1. BMR decreases

  2. RBCs collapse and urine production increases

  3. BMR increases

  4. RBCs collapse and urine production decreases

Show answer
Correct Option: B

The pipes which carry the waste waters from the houses is known as

evs sources of water water as nutrient basics of water pollution nutrients and deficiency

  1. Waste lines

  2. Drainage lines

  3. Water lines

  4. Wastewater lines

Show answer
Correct Option: B
Explanation:

Drainage lines are artificial passageway used to carry the waste water from the houses. It then carries the waste water to the municipal sewage system where it is treated before discharging in water body. Water lines are artificial passageway used to carry the water to the houses.  

Thus, the correct answer is option B.

Sewage water is freshened up by

evs sources of water water as nutrient basics of water pollution nutrients and deficiency

  1. Boiling

  2. Chemical treatment

  3. Biological treatment

  4. Both B and C

Show answer
Correct Option: D

Manholes are located at every .......... in the sewerage.

evs sources of water water as nutrient basics of water pollution nutrients and deficiency

  1. 10 to 20 m

  2. 1 to 2 km

  3. 50 to 60 m

  4. 3 km

Show answer
Correct Option: C

Domestic and municipal supplies of water constitutes percentage of total water consumption

evs sources of water water as nutrient basics of water pollution nutrients and deficiency

  1. 19%

  2. 11%

  3. 7%

  4. 1.1%

Show answer
Correct Option: D
Explanation:
  • Drinking water, also known as potable water, is water that is safe to drink or to use for food preparation.
  • The amount of drinking water required to maintain good health varies, and depends on physical activity level, age, health-related issues, and environmental conditions.
  • Domestic and municipal supplies of water constitute 1.1%  percentage of total water consumption.
  • So,the correct answer is '1.1%'.

Which of the chemical is used to freshened up the wastewater?

evs sources of water water as nutrient basics of water pollution nutrients and deficiency

  1. Boric acid

  2. Naphtelene

  3. Chlorine

  4. None of the above

Show answer
Correct Option: C

Many sewer pipelines connect to form the 

evs sources of water water as nutrient basics of water pollution nutrients and deficiency

  1. Drainage

  2. Wastewater body

  3. Sewerage

  4. All of the above

Show answer
Correct Option: C
Explanation:

Sewerage is the infrastructure that conveys sewage from many sewer pipelines. Drainage is an artificial passageway that carries the waste water from the houses. Sewer pipelines are artificial passageway used to carry the sewage and water water from the drainage system. It then carries the waste water to the municipal sewage system or sewerage.   

Thus, the correct answer is option C.

Potable water is the water which is

evs sources of water water as nutrient basics of water pollution nutrients and deficiency

  1. Obtained from a river.

  2. Obtained from a lake.

  3. Pure and fit for drinking.

  4. Used only for washing clothes.

Show answer
Correct Option: C
Explanation:

Potable water is a water which is fit for consumption by humans and other animals. It is also called as drinking water, in a reference to its intended use. Water may be naturally potable, as is the case with pristine springs, or it may need to be treated in order to be safe. In either instance, the safety of water is assessed with tests which look for potentially harmful contaminants.

Therefore, the correct answer is option C.

Maximum use of fresh water is in

evs sources of water water as nutrient basics of water pollution nutrients and deficiency

  1. Agriculture

  2. Domestic use

  3. Industry

  4. Pisciculture

Show answer
Correct Option: A
Explanation:

Maximum use of fresh water is in agriculture. About 70% of the total fresh water is used in agriculture. About 20% is used for industrial purpose. About 10% of the fresh water is used for domestic and municipal use.

Thus, the correct answer is 'Agriculture.'

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