Tag: natural cycles and resources

Questions Related to natural cycles and resources

Which of the following breed yield good quality wool?

biology air and atmosphere natural cycles and resources constituents of air medicinal use of microorganism component of air - nitrogen

  1. Nali

  2. Marwari

  3. Patan wadi

  4. Lohi

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Correct Option: D
Explanation:
  1. The Lohi breed yield 100 % quality wool.
  2. The Lohi is found in southern Punjab in Pakistan. They are known for their good quality wool and meat production. The body of the breed is white and the head is usually tan, black or brown in color.  
Their home tract is Rajasthan, and mainly distributed in the Churu, Ganganagar and Jhunjhunu districts of Rajasthan.

Which of the following fertilizers does not replenish nitrogen in the soil?

biology air and atmosphere natural cycles and resources constituents of air medicinal use of microorganism component of air - nitrogen

  1. CAN

  2. Urea

  3. Superphosphate lime

  4. Ammonium phosphate

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Correct Option: C
Explanation:

Phosphate rock is too insoluble for direct use, and is commonly treated with sulfuric acid to make a mixture of calcium sulfate and the more soluble calcium hydrogen phosphate, called superphosphate.The use of superphosphate usually supplies adequate calcium. 

Nitrogen fixation means:

biology air and atmosphere natural cycles and resources constituents of air medicinal use of microorganism component of air - nitrogen

  1. manufacture of nitrogen

  2. liquefication of nitrogen

  3. conversion of nitrogen into nitric acid

  4. conversion of atmospheric nitrogen into useful compounds

  5. mixing of nitrogen with other elements

Show answer
Correct Option: D
Explanation:

Nitrogen fixation is a process in which nitrogen(N2) in the atmosphere is converted into ammonia (NH3) and useful compounds. Atmospheric nitrogen or molecular dinitrogen (N2) is relatively inert: it does not easily react with other chemicals to form new compounds.

So the answer is D.

Balance of oxygen and carbon dioxide in atmosphere is maintained by :

chemistry water and air and their importance natural cycles and resources constituents of air component of air - nitrogen

  1. plants

  2. animals

  3. humans

  4. All of the above

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Correct Option: D
Explanation:
The balance of oxygen and carbon dioxide is maintained in the atmosphere by the oxygen released by plants during photosynthesis and carbon dioxide released by human and animals.

Hence the option D is correct.

Isotope of oxygen is used to detect the reaction mechanism of:

chemistry water and air and their importance natural cycles and resources constituents of air component of air - nitrogen

  1. formation of esters

  2. formation of amines

  3. formation of alkanes

  4. formation of alkenes

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Correct Option: A
Explanation:

Isotope of oxygen is used to detect the reaction mechanism of formation of esters. 

What process replenishes the atmosphere with oxygen?

chemistry water and air and their importance natural cycles and resources constituents of air component of air - nitrogen

  1. Oxygen Cycle

  2. Water Cycle

  3. Photosynthesis

  4. Both $A$ and $C$

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Correct Option: C
Explanation:

During the process of photosynthesis, the hydrogen is combined with carbon atoms to produce oxygen which is then released into the atmosphere.


Hence the option C is correct.

Oxygen is not a constituent of:

chemistry water and air and their importance natural cycles and resources constituents of air component of air - nitrogen

  1. urea

  2. cloth

  3. graphite

  4. book

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Correct Option: C
Explanation:

Oxygen is not present in graphite. It is am allotrope of carbon. 

Animals cannot live without :

chemistry water and air and their importance natural cycles and resources constituents of air component of air - nitrogen

  1. plants

  2. air

  3. oxygen

  4. only A and B

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Correct Option: A,B,C
Explanation:

Plant is necessary for animals for food and shelter,air is important for atmosphere and oxygen is important for breathing.

Plants consumes ____________ and gives _____________.

chemistry water and air and their importance natural cycles and resources constituents of air component of air - nitrogen

  1. oxygen, carbon dioxide

  2. carbon dioxide, oxygen

  3. sulphur dioxide, oxygen

  4. oxygen, sulphur dioxide

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Correct Option: B
Explanation:

Plants consumes carbon dioxide and gives oxygen.

As in the process of photosynthesis plants consumes carbon dioxide and during photosynthesis plants release oxygen.

How is the percentage of oxygen in an atmosphere maintained?

chemistry water and air and their importance natural cycles and resources constituents of air component of air - nitrogen

  1. consumption of carbon dioxide by plants

  2. consumption of oxygen by living beings

  3. consumption of oxygen by plants

  4. consumption of carbon dioxide by animals

Show answer
Correct Option: A,B
Explanation:

The percentage of oxygen in an atmosphere is maintained by consumption of carbon dioxide by plants and consumption of oxygen by living beings.


Hence the options A and B are correct.