# GATE Questions & Answers of Types of pollutants, Their sources and impacts

## What is the Weightage of Types of pollutants, Their sources and impacts in GATE Exam?

Total 5 Questions have been asked from Types of pollutants, Their sources and impacts topic of Air Pollution subject in previous GATE papers. Average marks 1.40.

There are 20,000 vehicles operating in a city with an average annual travel of 12,000 km per vehicle. The NOx emission rate is 2.0 g/km per vehicle. The total annual release of NOx will be

A coal containing 2% sulfur is burned completely to ash in a brick kiln at a rate of 30 kg/min. The sulfur content in the ash was found to be 6% of the initial amount of sulfur present in the coal fed to the brick kiln. The molecular weights of S, H and O are 32, 1 and 16 g/mole, respectively. The annual rate of sulfur dioxide $(S0_2)$ emission from the kiln (in tonnes/year, up to two decimal places) is ______

Pre-cursors to photochemical oxidants are

The concentration of Sulphur Dioxide (SO2) in ambient atmosphere was measured as 30 $\mathrm{\mu }$g/m3. Under the same conditions, the above SO2 concentration expressed in ppm is ___.