Tag: natural resources- air, water and land

Questions Related to natural resources- air, water and land

Which among the given is not a natural 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. Automobile exhausts

  2. Vegetation decay

  3. Forest fire

  4. Volcanic eruptions

Show answer
Correct Option: A
Explanation:
The automobile exhaustion is not a natural source of air pollution, it is man-made air pollution.
It is emitted as a result of the combustion of fuels such as natural gas, gasoline, petrol,bio-diesel etc. It discharges a large amount of $CO _2$(carbon dioxide), NO, CO, ozone etc.

Hence, the correct option is A.

Which of the following applications reveal that nitrogen is inert?

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

  1. Tinned food products

  2. Making of fertilizers

  3. Refrigerant

  4. Electric bulbs

Show answer
Correct Option: A,D
Explanation:

Usage of nitrogen in tinned food products, in electric bulbs and as a refrigerant indicating the inactive nature of nitrogen.

The component of air essential for growth of plants and animals is ________.

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

  1. oxygen

  2. nitrogen

  3. hydrogen

  4. argon

Show answer
Correct Option: B
Explanation:

The component of air which is essential for growth of plants and animals is nitrogen. Atmospheric nitrogen is converted by bacteria through nitrogen fixation to nitrate and nitrites, which is consumed by plants. Animals also need nitrogen, as all amino acids which are the building blocks of proteins have basic element of nitrogen.

Which is not dangerous for life?

introduction to natural resources natural resources- air, water and land land air chemistry

  1. Nuclear blast

  2. Deforestation

  3. Biopollutants

  4. Ozone layer

Show answer
Correct Option: D
Explanation:
Nuclear blast can cause the release of radiations which can cause cancer and the radioactive materials can lead to soil pollution. Deforestation results in soil erosion and the quality of soil is degraded in which the plants cannot grow. The biopollutants are the natural microbes which act as pollutants when there is an increase in the number. 
Ozone layer is present in the stratosphere over the Earths surface. This is a protective layer which prevents the entry of the harmful UV rays from the sun into the atmosphere. 
Thus, the correct answer is option D.  

The percentage of oxygen in air is

introduction to natural resources natural resources- air, water and land land air chemistry

  1. 78%

  2. 0.03%

  3. 21%

  4. 80%

Show answer
Correct Option: C
Explanation:

Air is a mixture of gases. It contains 79% nitrogen, 21 % oxygen, 0.93% argon, 0.03% carbon dioxide, and traces of hydrogen, helium and other "noble" gases.

Greenhouse effect occurs in

introduction to natural resources natural resources- air, water and land land air chemistry

  1. Mesosphere

  2. Troposphere

  3. Ionosphere

  4. None of the above

Show answer
Correct Option: B
Explanation:
The atmosphere is made up of five layers mainly, exosphere, thermosphere, mesosphere, stratosphere and troposphere. The troposphere is about 12 km thick and is found at ground level. Living organisms are found in this layer. Most of the human activities take place in this region as this is the region where human beings live. The percentage of poisonous gas like carbon dioxide, nitrogen oxide etc.  increases due to burning of fossil fuels which do not allow the heat to escape from the earth atmosphere and leads to increase in temperature and cause global warming.
So, the correct option is B.
Don't press the panic button. Despite the crisis in Japan's plants, India must not take nuclear power off the table.
In view of recent nuclear blasts due to Tsunami in Japan, countries are:
introduction to natural resources natural resources- air, water and land land air chemistry land,labour, capital and entrepreneur how does production take place?

  1. going to stop nuclear-energy plan

  2. devising methods to avoid this type of disaster

  3. stressing thermal energy plan

  4. stressing hydro-electric power

Show answer
Correct Option: B
Explanation:

To avoid nuclear blasts due to Tsunami in Japan counteries are devising methods to avoid this types of disasters.

The soil is formed by the breaking down of rocks by the action of _____.

introduction to natural resources natural resources- air, water and land land air chemistry land,labour, capital and entrepreneur how does production take place?

  1. wind

  2. water

  3. climate

  4. all of these

Show answer
Correct Option: D
Explanation:

The soil is formed by breaking down of rocks by an action of wind, water and climates like thawing of water that seeped through rock and climatic changes such as weathering of rocks, landslides also causes breaking of big rocks. This is how soil is formed by all these natural processes.

Which layer protects us from harmful ultraviolet rays of the sun?

zoology natural resources- air, water and land ozone - a case study stratospheric pollution ozone and its depletion

  1. First layer

  2. Second layer

  3. Ozone layer

  4. Exosphere

Show answer
Correct Option: C
Explanation:

The ozone layer protects us from harmful ultraviolet rays of the sun.

A considerable part of the harmful ultraviolet radiation of the Sun does not reach the surface due to:

zoology natural resources- air, water and land ozone - a case study stratospheric pollution ozone and its depletion

  1. $CO _2$

  2. $N _2$

  3. $O _3$

  4. $O _2$

Show answer
Correct Option: C
Explanation:

Ozone is formed as a result of the action of U.V. light on oxygen and it forms a layer in upper layers of the atmosphere. 


It protects life on earth from harmful U.V. radiation.

So, the correct option is $A$