Tag: for a pollution free nature

Questions Related to for a pollution free nature

Afforestation is necessary for:

  1. soil conservation

  2. soil erosion

  3. well control

  4. low humidity


Correct Option: A
Explanation:

Afforestation is the process of planting trees, or sowing seeds, in a barren land devoid of any trees to create a forest. The benefits of this practice, which is called agroforestry, are:

  1. It provides a supply of timber, fruit, and fodder for cattle apart from crop production
  2. It prevents soil erosion and thus conserves soil.
  3. It enables better retention of water
  4. It shields crops from excessive wind and sun damage

In terms of the environmental benefits, planting trees is always beneficial whether it takes place in a barren land or is used as a method to regenerate a depleted forest. Trees help check atmospheric carbon dioxide; large scale afforestation can curb the problems caused due to burning of fossil fuels, industrialization and so forth.

Which of the following is a sink for CO?

  1. Haemoglobin

  2. Microorganism presence in the soil

  3. Ocean

  4. Plant


Correct Option: B
Explanation:

Microorganism presence in the soil is the sink for CO.

Which type of rain can cause soil pollution?

  1. Acid rain

  2. Tropical rain

  3. Temperate rain

  4. All of these


Correct Option: A
Explanation:

When the rain droplets gets mixed with nitrogen and sulfur oxide it causes acid rain. this acid rain when fall on earth react with soil because of chemicals present in acid rain, the fertility of particular area gets affected.

Which element is used in the preparation of pesticides ?

  1. Arsenic

  2. Bismuth

  3. Antimony

  4. Nitrogen


Correct Option: A
Explanation:

Pesticides are compounds that destroy insects (pests). By the 15th century, toxic chemicals such as arsenic, mercury, and lead were being applied to crops to kill pests.

How industrial effluents effects soil pollution?

  1. By decreasing its fertility

  2. By decreasing its water absorbing capacity

  3. By increasing its fertility

  4. Both A and B


Correct Option: D
Explanation:

The industrial effluents passing through the field add toxic substances to the soil and decrease the soil fertility and its water-absorbing capacity.


Hence the correct option is D.

Negative soil pollution is:

  1. reduction in soil productivity due to erosion and over use

  2. reduction in soil productivity due to addition of pesticides and industrial wastes

  3. converting fertile land into barren land by dumping ash, sludge and garbase

  4. none of the above


Correct Option: A
Explanation:

Negative soil pollution occurs due to the overuse of soil & its erosion hence there will be a decrease in soil productivity. 

The other causes of negative soil pollution such as developmental activities, overgrazing and soil erosion.

Afforestation and reforestation is a measure mainly to control _________.

  1. soil pollution

  2. water pollution

  3. thermal pollution

  4. none of above


Correct Option: A
Explanation:

Afforestation is the establishment of a forest or stand of trees in an area where there was no previous tree cover.
Reforestation is the reestablishment of forest cover, either naturally (by natural seeding, coppice, or root suckers) or artificially (by direct seeding or planting).

Which of the following properties of soil decreases due to deforestation?

  1. Nutrient content

  2. Fertility

  3. Texture

  4. All of the above


Correct Option: D
Explanation:

Deforestation is a major cause which leads to the change in soil properties. It affects the nutrient content (which cannot be replenished in the soil), texture and fertility of soil (due to erosion).

Which one of these are biodegradable?

  1. Plastic bags

  2. Glass bottles

  3. Plant twigs

  4. Plastic bottles


Correct Option: C
Explanation:

Plant twigs are biodegradable. Rest of them are non-biodegradable.

Which of these is not the cause for soil pollution?

  1. Deforestation

  2. Solid waste

  3. Vehicles

  4. Fertilisers


Correct Option: C
Explanation:

Vehicles do not directly cause soil pollution. Deforestation, excessive use of fertilizers and solid wastes may cause soil pollution