He normal amount of overhead ozone is? A. 300 DU B. 400 DU C. 350 DU D. 450 DU Right Answer: C. 350 DU Share : December 13, 2017 Hassan Ali Chemistry Total 0 Votes: 0 0 Tell us how can we improve this Mcqs? Captcha: + = Verify Human or Spambot ? Related Mcqs Check Below -The thickness of ozone layer is?Carboxylic acid react with ammonia to form which salt?. In a given system, water and ice are in equilibrium, if the pressure is applied to the above system then?