Tag: component of air - nitrogen

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

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

  1. artificial fixation

  2. nitrogen fixation by lightening

  3. industrial fixation

  4. synthetic fixation
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Which of the following breed yield good quality wool?

  1. Nali

  2. Marwari

  3. Patan wadi

  4. Lohi
Reveal answer Fill a bubble to check yourself
D Correct answer
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.
Multiple choice biology air and atmosphere natural cycles and resources constituents of air medicinal use of microorganism component of air - nitrogen

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

  1. CAN

  2. Urea

  3. Superphosphate lime

  4. Ammonium phosphate
Reveal answer Fill a bubble to check yourself
C Correct answer
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. 

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

Nitrogen fixation means:

  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
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. plants

  2. animals

  3. humans

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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.