Tag: component of air - nitrogen

Questions Related to component of air - nitrogen

Natural fixation of nitrogen takes place through a non-biological process called ___________.

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

  1. artificial fixation

  2. nitrogen fixation by lightening

  3. industrial fixation

  4. synthetic fixation

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Correct Option: B
Explanation:

In non biological fixation of nitrogen when the plant dies the fixed nitrogen is released making it available to other plants and this helps to fertilize the soil. The great majority of legumes have this association but a few genera do not. In farming practices fields are rotated through various crops like clover and buckwheat which are known as green manure.

The fixation of nitrogen can also be brought artificially.
biology air and atmosphere natural cycles and resources constituents of air medicinal use of microorganism component of air - nitrogen

  1. True

  2. False

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Correct Option: A
Explanation:

By the use of Haber process, fixation of nitrogen can be done artifically.

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

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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.