It was reported in media that eighteen Indian institutions are part of South Asian Nitrogen Hub to study nitrogen pollution. In this context, consider the following statements:

 

1. Nitrogen particles make up the largest fraction of PM2.5
2. Nitrogen adds mass to air and helps in maintaining atmospheric pressure
3. Nitrous oxide (N2O) is 300 times less potent than carbon dioxide

Select the correct option from the codes given below:

[A] 1 and 2
[B] 2 and 3
[C] 1 and 3
[D] 1,2,3

Which of these statements is CORRECT?

Question 4 options:

The nitrogen cycle describes the fluxes of nitrogen atoms among air, land, and water. Nitrogen enters the atmosphere in the form of N2O or N2 gas when people burn fossil fuels. Nitrogen enters soil as bacteria convert atmospheric nitrogen to NO3-, which can be absorbed by plants. Water contacting soil will pick up nitrogen and carry it to a lake or ocean. In recent decades, the use of fertilizers containing nitrogen has increased the amount of nitrogen that flows into lakes and oceans, causing blooms of algal referred to as eutrophication.

Use this information and your knowledge about biology to answer questions 16-20.

16. All of the nitrogen in fertilizers will end up in bodies of water. True or False

17. If the supply of nitrogen limits the growth of plants, emissions from burning fossil fuels should lead to more biomass of plants. True or False

18. A teleconnection occurs when nitrogen introduced as fertilizer ends up causing algae to bloom in the ocean. True or False

19. Negative feedback would occur if emissions of fossil fuel increase the rate of nitrification by bacteria. True or False

20. Positive feedback occurs when nitrification by bacteria causes the population of bacteria to grow. True or False

In training for scuba diving, they tell you that when you'rebellow 100 ft or so you have to watch out for changes in mentalstate that resemble drunkenness. The cause of these mentaldisturbances is called nitrogen narcosis, and it has something todo with the increased pressure on the nitrogen component of the gasthat you're breathing out of your tank. I just read this articlefrom the what-if section of XKCD (halfway down the page, under theheader about Michael Phelps) that mentioned a very similar soundingdisorder called high pressure nervous syndrome. Are nitrogennarcosis and high pressure nervous syndrome related, or are theeffects of high pressure nitrogen and high pressure by itselfseparable?