Tag: natural resources - air, water and land

Questions Related to natural resources - air, water and land

Deep black soil is considered to be highly productive due to high proportion of

biology natural resources - air, water and land soil - formation and profile soil-nature soil profile

  1. Silt and earthworm

  2. Clay and humus

  3. Gravel and $Ca^{++}$

  4. Sand and Zn

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Correct Option: B

The top most layer of soil contains

biology natural resources - air, water and land soil - formation and profile soil-nature soil profile

  1. Humus, living organism and soil

  2. Human, living organism and plants

  3. Humans and soil particles

  4. Human and microorganism

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Correct Option: A
Explanation:

The top most layer of soil is said to contain and support a lot of living organisms. It also has organic manure in it that supports the growth and development of plants. 

So, option a "Humus, living organisms and soil" is the correct answer.

Soil contain rock particles

biology natural resources - air, water and land soil - formation and profile soil-nature soil profile

  1. Water and plants

  2. Minerals, organic matter, air and water

  3. Air and plants

  4. Air, water and plants

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Correct Option: B
Explanation:

The soil is formed by weathering of rocks. It contains an organic material (dead decay of leaves and plants) called humus, which makes soil fertile, and mineral by the breakdown of rocks. It also contains soil and water. Thus, the correct option is B.

Ozone belongs to which groups of the periodic table?

biology natural resources - air, water and land group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

  1. IV

  2. V

  3. VI

  4. VII

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Correct Option: C
Explanation:

$O _3$ is an allotrope of oxygen and hence, it belongs to VI A group.

Identify the incorrect statement from the following

zoology natural resources - air, water and land carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Oxides of nitrogen in the atmosphere can cause the depletion of ozone layer

  2. Ozone absorbs the intense ultraviolet radiations of the sun

  3. Depletion of ozone layer is because of its chemical reactions with  CFC

  4. Ozone absorbs infrared radiations

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Correct Option: D
Explanation:

Ozone doesn't absorb infrared radiation , it absorbs ultraviolet radiations .