NCERT Exemplar Class 8 Science Chapter 18 Pollution of Air and Water are part of NCERT Exemplar Class 8 Science. Here we have given NCERT Exemplar Class 8 Science Chapter 18 Pollution of Air and Water. NCERT Exemplar Class 8 Science Chapter 18 Pollution of Air and Water Multiple Choice Questions (MCQs) Question1 Air is a mixture of various gases. One of the gas is 21% part … [Read more...]