Tag: for a pollution free nature

Questions Related to for a pollution free nature

Which of the among is a major greenhouse gas implicated in global warming?

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. $\displaystyle { CH } _{ 4 }$

  2. $\displaystyle { CO } _{ 2 }$

  3. $\displaystyle { NH } _{ 3 }$

  4. $\displaystyle { N } _{ 2 }$

  5. $\displaystyle { O } _{ 2 }$

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Correct Option: A
Explanation:

Option A is the correct answer.

Methane absorbs heat from the sun very effectively and warms the atmosphere, and hence it is a major greenhouse gas

Thermal pollution causes a decrease in dissolved oxygen.

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. True

  2. False

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Correct Option: A
Explanation:

Thermal pollution is when an industry or other human-made organization takes in water from a natural source and either cools it down or heats it up. They then eject the water back into the natural resource, which changes the oxygen level and can have a disastrous effect on the local ecosystem. 

Environmental pollution can be controlled by:

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. spraying insecticides and pesticides

  2. the open burning of tree stumps

  3. treating factory wastes before disposing them

  4. disposing hot water from power stations into the sea

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Correct Option: C
Explanation:

Environmental pollution can be controlled by treating factory wastes before disposing of them. So, if we treat wastewater before disposing of in a river, it will surely decrease the amount of dumped pollutants. 

For example- Steel industries have a high concentration of cyanide in it, and it led to harmful effect. So, treatment is really necessary.

Use of pesticides which do not contaminate soil help in control of ________.

chemistry for a pollution free nature properties of soil soil pollution and its effects soil and soil pollution

  1. air pollution

  2. soil pollution

  3. industrial pollution

  4. none of above

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Correct Option: B
Explanation:

Development of such pesticides should be encouraged, which may save crops from pests and rodents but should not contaminate soil with toxic chemicals.
It is a measure to control soil pollution.

Soil pollution is the outcome of _________.

chemistry for a pollution free nature properties of soil soil pollution and its effects soil and soil pollution

  1. deforestation

  2. pesticides and herbicides

  3. industrial waste

  4. all of above

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Correct Option: D
Explanation:

Most industries are dependent on extracting minerals from the Earth.the industrial waste lingers in the soil surface for a long time and makes it unsuitable for use.
Pesticides and herbicides are used in agricultural practices and these chemicals penetrate into soil and damages them.
Cutting of trees leads to soil erosion.

One of the soil pollutants is _______

chemistry for a pollution free nature properties of soil soil pollution and its effects soil and soil pollution

  1. radioactive substances

  2. pesticides

  3. herbicides

  4. all of above

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Correct Option: D
Explanation:

Radioactive substances resulting from explosions of nuclear testing laboratories and industries giving rise to nuclear dust radioactive wastes, penetrate the soil and accumulate giving rise to land/soil pollution.
Pesticides and herbicides are added in soil in agriculture practices to remove unwanted plants. these chemicals penetrate into soil and damages the soil.

Reducing chemical fertilizer and pesticide use controls _______.

chemistry for a pollution free nature properties of soil soil pollution and its effects soil and soil pollution

  1. soil pollution

  2. global warming

  3. both of them

  4. none of above

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Correct Option: A
Explanation:

Applying bio-fertilizers and manures can reduce chemical fertilizer and pesticide use. Biological methods of pest control can also reduce the use of pesticides and thereby minimize soil pollution.

Which of the following is a soil pollutant due to agricultural practice?

chemistry for a pollution free nature properties of soil soil pollution and its effects soil and soil pollution

  1. Pesticides

  2. Herbicides

  3. Insecticides

  4. All of above

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Correct Option: D
Explanation:

Pesticides are substances meant for attracting, seducing, and then destroying any pest. 
Herbicides are substances that is toxic to plants, used to destroy unwanted vegetation.
Insecticides are substances used for killing insects.
All the are used in agriculture and harmful to soil.

 There should be sufficient duration between the harvesting of crops and time of last spray of pesticides. This is a measure to control _________.

chemistry for a pollution free nature properties of soil soil pollution and its effects soil and soil pollution

  1. air pollution

  2. water pollution

  3. soil pollution

  4. all of above

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Correct Option: C
Explanation:

There should be sufficient duration between the harvesting of crops and time of last spray of pesticides.
It is a measure to control soil pollution.
This will help in reducing contamination of pesticides, directly to the crop. It will also cause less contamination of chloride and other chemicals to the soil.

Pesticides and fertilizers should be applied on croplands only in limited amounts because it helps in control of ______.

chemistry for a pollution free nature properties of soil soil pollution and its effects soil and soil pollution

  1. soil pollution

  2. water pollution

  3. thermal pollution

  4. all of above

Show answer
Correct Option: A
Explanation:

Pesticides and fertilizers should be applied on croplands only in recommended dose, prescribed by Indian Standard Institution experts. It will help in reducing the level of water and soil pollution caused through these chemicals.