Class 9 Social Science: Chapter 3
Class 9 Social Science: Chapter 3 A) Oxygen B) Carbon dioxide C) Nitrogen D) Argon Answer: C) Nitrogen. The Earth’s atmosphere is composed of a mixture of various gases, and nitrogen is the most abundant gas, making up 78% of it. A) Stratosphere B) Mesosphere C) Troposphere D) Thermosphere Answer: C) Troposphere. The troposphere contains … Read more