The principal constituent of the atmosphere of the Earth is? a) Oxygen b) Carbon c) Hydrogen d) NitrogenΒ About 78% of the Earth’s atmosphere is composed of nitrogen. γππππππππγ This Page in PDF File NOW!!! Read more articles Previous PostThe SI unit of electric current is? Next PostWhat is Dry Ice? Leave a Reply Cancel replyCommentEnter your name or username to comment Enter your email address to comment Enter your website URL (optional) Save my name, email, and website in this browser for the next time I comment. Δ You Might Also Like What is a light year equal to in kilometers? March 23, 2023 Malaria is caused by? June 23, 2020 Instrument used for measuring very high temperature is: January 27, 2023 Where is Digestion of Food Completed? December 2, 2022 Deficiency of vitamin A results in: December 24, 2022 Which instrument is used to measure depth of ocean? March 22, 2023