SOLUTIONS – INSIGHTS REVISION TEST for Preliminary Exam 2018: Test – 11

SOLUTIONS  INSIGHTS REVISION TEST for Preliminary Exam 2018: Test – 11   1) National Air quality Index is determined on the basis of concentration of which of the pollutants? Carbon Dioxide Carbon monoxide Ozone Ammonia Particulate Matter 2.5 Select the correct answer using the code below: a) 1 and 2 only b) 1, 2 and …