UPSC Civil Services Prelims Exam 2020 Expected MCQ Part-53
Q.1) Pollution is defined as an addition or excessive addition of certain materials to the physical environment. With reference to this consider the following statements: 1. Primary pollutants persist in the form in which they are added to the environment 2. Secondary Pollutants are formed by interaction among the primary pollutants. 3. Qualitative Pollutants do … Read more