Question

V. Read the Passage and give the correct Answer to each questions 13. Air is a mixture of several gases. The main gases are nitrogen products such as, fertilisers for plants and for making the air inert, oxygen (78.09\%) for breathing and carbon dioxide (0.03%) for photosynthesis. Some other argon, neon, helium, krypton, hydrogen, ozone, zenon and methane are also present. for forming (20.95\%) gases like their presence felt in one way or the Besides, water vapour and dust particles make other. Uses of carbon dioxide ii. What is the gas we need to survive? iii. What are the uses of nitrogen? iv. Mention some of the gases name. 61​

Answer 1

(i). carbon dioxide (0.03%) for photosynthesis

(ii). Oxygen

(iii). fertilisers for plants and for making the air inert, oxygen .

(iv). oxygen,carbon dioxide, Nitrogen