question_answer 25)

  What would happen, if all the oxygen present in the environment is converted to ozone? (a) We will be protected more (b) It will become poisonous and kill living forms (c) Ozone is not stable, hence it will be toxic (d) it will help harmful sun radiations to reach earth and damage many life forms

Answer:

  (b) Ozone is triatomic allotrope (occurrence of one element in more than one form) of oxygen. It is a blue gas with pungent odour and is highly poisonous to the living system. It is present in stratosphere region of atmosphere however, it does not exists in the lower atmosphere region called troposphere, hence does not show any fatal effect on life forms. If its value in the atmosphere increases the appreciable amount, it may become fatal, i.e., become poisonous and will kill all the living forms.