Tag: land

Questions Related to land

Which among the following result in the formation of soil?

soil as a natural resource natural resources - air, water and land land physical resources biology

  1. Radiation

  2. Weathering

  3. Erosion

  4. Pollution

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Correct Option: B

What is best pH of soil for cultivation?

soil as a natural resource natural resources - air, water and land land physical resources biology

  1. 3.4 - 5.4

  2. 4.5 - 5.5

  3. 5.5 - 6.5

  4. 6.5 - 7.5

Show answer
Correct Option: C
Explanation:

  • Soil nature is described in pH values. It can be alkaline, acidic or neutral. 
  • Highly acidic and highly saline soil often remains injurious for plant growth, microorganisms, etc. 
  • Soil pH strongly affects microbial activities. Neutral or slightly acidic soil (5.5-6.5) remains best for the growth of the majority of plants.

Therefore, the correct answer is option C.

Which is a green house gas?
A) Methane 

B) Chlorofluorocarbons 
C) $CO _{2}$

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. $A$ and $B$

  2. $B$ and $C$

  3. $C$ and $D$

  4. $A, B$ and $C$

Show answer
Correct Option: D
Explanation:

Greenhouse effect
* The progressive heating up of surface of the earth is earth is called green house effect or global warming.
 $CO _2$ and $H _2O$ block a part of the heat (IR) emitted by the earth & reflect back. Due to this earth surface gets heated up.
 50% in $CO _2$ content of air can increase the surface temperature of the earth by $3^oC$.
* In addition to $CO _2$ , the other green - house gases are CFCs (17%), $O _3$ (18%), NO (4%), water vapour (2%).

Which of the following is not a sink for CO?

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. Haemoglobin

  2. Microorganims present in the soil

  3. Oceans

  4. None of the above

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Correct Option: A
Explanation:


* Incomplete combustion of fossil fuels liberate CO into air. 80% of CO is released from automobiles.


* Permissible level of CO in air is 9 ppm. It reduces $O _2$ supply in human by forming a stable carboxyhaemoglobin.

$2C+O _2\rightarrow 2CO$
$2CH _4+3O _2\rightarrow 2CO+4H _2O$

* CO interacts with oxyhaemoglobin ($O _2Hb$) and forms carboxyhaemoglobin (CO-Hb) as :

$O _2Hb+CO\rightarrow COHb+O _2$

* CO has high affinity for haemoglobin than that of oxygen.

Therefore, option A is correct.

The ash can cause _______ problems.

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. digestive 

  2. reproductory 

  3. respiratory 

  4. nervous 

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Correct Option: C
Explanation:

The ash can cause respiratory problems for young children, the elderly or those already with respiratory ailments.

The most problematic gases emitted in a volcanic eruption includes :

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. sulphur dioxide

  2. carbon dioxide

  3. hydrogen fluoride

  4. All of the above

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Correct Option: D

The ____ gets polluted by the presence of dust particles. 

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. air

  2. soil

  3. both $A$ and $B$

  4. none of the above

Show answer
Correct Option: A
Explanation:

The air gets polluted by the presence of dust particles.

Diesel vehicles pollute the environment largely through:
A) $CO$
B) $NO _x$
C) ParticulatesNOx

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. A & B

  2. B & C

  3. C & A

  4. A, B & C

Show answer
Correct Option: D
Explanation:

Diesel vehicles on burning forms all these as a product so they are major pollutants.

Forest fire produces ...... pollution.

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. air

  2. water

  3. sea

  4. soil

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Correct Option: A
Explanation:

A forest fire is a natural source of air pollution. 


Several major air pollutants can be released when a fire is caused in the forest. 

For example, carbon monoxide even in small quantities can cause several damage to the plant and animal life. Higher levels of carbon monoxide content reduce the oxygen-carrying capacity of the blood and cause breathing problems.

Thus, the correct answer is option A. 

Which one of the following is a  man-made source of air pollution?

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. Volcanic-eruption

  2. Automobile-exhaust

  3. Both A and B

  4. None of these

Show answer
Correct Option: B
Explanation:

Anthropogenic or man-made source of pollution is automobile exhaust. When fuel burns various gases like carbon dioxide, oxides of nitrogen, sulfur dioxide, carbon monoxide are released into the air.