Question Detail Air contains maximum amount of oxygennitrogenhydrogencarbon dioxide Answer: Option B Ad Similar Questions : 1. Which have maximum number of isotopes ? BromineAluminiumPoloniumCarbon Answer: Option C 2. The high reactivity of fluorine is due to ? small size of fluorine atomits high electro negativityavailability of d-orbitalsstrong F - F bond Answer: Option B 3. The material which can be deformed permanently by heat and pressure is called a thermosetthermoplasticchemical compoundpolymer Answer: Option A 4. Mass number of a nucleus is : the sum of the number of protons and neutrons present in the nucleusalways more than the atomic weightalways less than its atomic numberNone of above Answer: Option A 5. pH of water is 5678 Answer: Option C Read more from - Chemistry Questions Answers