Question

The concentration of which gas is highest in our environment?
a. Nitrogen
b. Hydrogen
c. Carbon dioxide
d. Oxygen

Answer 1

Hint: The atmosphere is composed of not one or two but many different gases. These gases also differ in their amount. There are permanent gases whose percentages do not change very rapidly such as nitrogen, oxygen and argon.

Complete answer:The atmosphere contains various gases, most of them are in small amounts. The most abundant gas present in the atmosphere is nitrogen. It comprises 78 per cent of the total atmosphere. Oxygen amounts to 21% and argon amounts to 0.9%. Gases like carbon dioxide, nitrous oxides, methane, and ozone are about one-tenth of one percent of the atmosphere. The concentration of water vapour varies from 0-4% depending on one’s location and time. The concentration of water vapour in the atmosphere helps to predict the weather conditions.

Looking at the options given:
Option a- The amount of Nitrogen in the atmosphere is around 78 per cent, which is the highest. Therefore this is the correct answer.
Option b- The amount of hydrogen is not that much and thus due to its negligible presence, it is not the right answer.
Option c- Carbon dioxide is present in the atmosphere in a very negligible amount but still has a lot of impact on the environment in terms of the greenhouse effect. This is not the right answer.
Option d- Oxygen is the second-highest gas in terms of concentration which is 21% in the atmosphere. However, since it is not the highest it is not the correct answer.

Thus, Option “a” is the correct answer.

Note: A very common yet essential phenomenon of the atmosphere is its stratification. It has five major layers. These are the exosphere, troposphere, stratosphere, mesosphere, and thermosphere. The lowest is the troposphere.