Which one of the following gases, present in the air near the surface of the Earth, has maximum concentration?

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Q: 95 (NDA-I/2010)

Which one of the following gases, present in the air near the surface of the Earth, has maximum concentration?

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,27,24,17,4,27,3

keywords: 

{'gases': [0, 0, 5, 12], 'methane': [0, 0, 0, 5], 'oxygen': [3, 0, 1, 0], 'air': [1, 0, 0, 0], 'maximum concentration': [1, 0, 1, 0], 'nitrogen': [1, 1, 0, 2], 'hydrogen': [0, 0, 1, 3], 'o2': [0, 0, 3, 1], 'h2': [0, 0, 4, 4], 'earth': [0, 1, 1, 1], 'n2': [1, 0, 3, 1]}

The correct answer is option 3: Nitrogen (N2). Nitrogen is the gas that has the highest concentration in the air near the surface of the Earth.

Option 1: Oxygen (O2) is also present in the air, but it has a lower concentration compared to nitrogen. Oxygen makes up roughly 21% of the Earth`s atmosphere.

Option 2: Hydrogen (H2) is a very light gas and it makes up only a small fraction of the Earth`s atmosphere. It is not one of the major components of air.

Option 4: Methane (CH4) is a greenhouse gas that is present in the atmosphere, but it is found in very low concentrations. Methane is produced by natural processes and human activities, such as livestock farming and the burning of fossil fuels.

Therefore, the gas with the maximum concentration in the air near the surface of the Earth is nitrogen (N2).