support@techeditz2utnpsc.com | 8300-921-521
Air
Samacheer Book Back Questions And Answers For Science Standard 6 Term 2 “Air“ I. Choose the correct answer: 1. _____ is the percentage of nitrogen in the air. (a) 78% (b) 21% (c) 0.03% (d) l% 2. Gas exchange takes…